Lyme disease: Surveillance

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Surveillance of Lyme disease in Canada

Canada does surveillance of Lyme disease to:

  • keep track of the number of people infected with Lyme disease
  • identify areas where tick populations may be emerging
  • identify the areas where people are most at risk of getting Lyme disease

To get as much information as possible, we work with:

  • provincial and territorial public health authorities
  • researchers and academics

Surveillance of human cases

Human surveillance is based on voluntary reporting of Lyme disease cases by provincial and territorial public health authorities.

Human cases of Lyme disease in Canada

Between 2009 and 2023, provincial public health units have reported 19,983 human cases of Lyme disease across Canada.

Number of human reported Lyme disease cases from 2009 to 2023
Year Number of cases
2009 144
2010 143
2011 266
2012 338
2013 682
2014 522
2015 917
2016 992
2017 2,025
2018 1,487
2019 2,634
2020 1,617
2021 3,147
2022 2,525
Preliminary 2023 2,544

Reported cases of Lyme disease include those that are locally-acquired and travel-related. The 2016 to 2023 Lyme disease cases are reported based on the 2016 Lyme disease case definition. There's underreporting because some cases are undetected or not reported. In addition, annual case counts fluctuate due to a combination of factors including public health prevention efforts, variations in weather affecting tick activity, and variations in human activity such as time spent outdoors or healthcare-seeking behaviors.

All 10 provinces voluntarily provided data over the 14-year period. Territories haven't reported any cases to the Public Health Agency of Canada since Lyme disease became nationally notifiable in 2009. This is because to date they haven't had any Lyme disease cases detected.

The 2023 preliminary national case count is an underestimation of the final case count for 2023. Two provinces haven’t reported preliminary Lyme disease case counts. Lyme disease cases reported by Nova Scotia are excluded from the preliminary national case count. The newly revised Nova Scotia Lyme disease provincial case definition is no longer aligned with the 2016 Lyme disease national case definition.

Surveillance of ticks

Active tick surveillance uses field study methods to collect ticks from their natural habitat or from animals.

Passive tick surveillance uses ticks collected from people and pets that doctors, veterinarians or the public submit voluntarily. These ticks are submitted to local public health units or other agencies for species identification.

Lyme disease risk areas

Blacklegged ticks are spreading to new areas in Canada in part due to climate change. They can also spread by travelling on birds and deer. You can sometimes find blacklegged ticks in areas outside of where they're known to live.

You're most likely to encounter ticks during the spring, summer and fall. However, ticks can be active at any time of the year when the temperature is consistently above freezing. The best way to prevent Lyme disease is to protect yourself against tick bites. Always take precautions against tick bites when you're in wooded or grassy areas.

Using data from active and passive tick surveillance, the Public Health Agency of Canada identifies areas where:

  • tick populations may be emerging
  • people are most at risk of getting Lyme disease

Check if you're in a risk area. Enter the first 3 characters of your postal code or municipality in the filter field below.

Lyme disease risk areas, 2023
Municipality Postal code areas
Abbotsford V2S, V2T, V3G, V4X
Abercorn J0E
Aberdeen E7L
Acadieville E4Y
Acton Vale J0H
Addington Highlands K0H
Adjala-Tosorontio L0N, L9R
Admaston/Bromley K0J, K7V
Ahahswinis 1 V9Y
Ajax L1S, L1T, L1Z
Akwesasne H0M
Akwesasne (Part) 59 K6H
Alberni-Clayoquot A V0R
Alberni-Clayoquot B V9Y
Alberni-Clayoquot D V9Y
Alberni-Clayoquot E V9Y
Alberni-Clayoquot F V9Y
Alderville First Nation K0K
Alexander R0E
Alma E4H
Alnwick/Haldimand K0K, K9A
Amherst B2N, B4H
Amherstburg N0R, N9J, N9V
Anmore V3H
Annapolis, Subd. A B0S
Annapolis, Subd. B B0S
Annapolis, Subd. C B0S
Annapolis, Subd. D B0P, B0T
Antigonish B2G
Antigonish, Subd. A B2G
Antigonish, Subd. B B0H,B2G
Argyle B0W
Argyle R0K
Armstrong R0C, V0E
Arnprior K7S
Arran-Elderslie N0H
Ascot Corner J0B
Asphodel-Norwood K0L
Athens K0E
Augusta K0E, K6V
Aurora L4G
Aylmer N5H
Baie-D'Urfé H9X
Barrie L4M, L4N
Barriere V0E
Barrington B0W
Bath E7J
Bayham N0J
Beaconsfield H9W
Beaubassin East / Beaubassin-est E4M, E4N, E4P
Beauharnois J0S, J6N
Becher Bay 1 V9Z
Beckwith K7C
Bedford J0J
Belcarra V3H
Belleville K0K, K8N, K8P, K8R
Big Grassy River 35G P0W
Blacks Harbour E5H
Blissville E2V, E5L
Bluewater N0M
Botsford E4M
Boucherville J4B
Bouctouche  E4S
Bowen Island V0N
Bradford West Gwillimbury L0G, L3Z
Brampton L6P, L6R, L6S, L6T, L6V, L6W, L6X, L6Y, L6Z, L7A
Brandon R7A
Brant N0E, N3R, N3S, N3T, N3W
Bridgewater B4V
Brigham J2K
Bright E6E, E6L, E7P
Brighton K0K, E7L, E7N, E7P
Bristol J0X
Brock L0K
Brockville K6V
Brome J0E
Bromont J2L
Brownsburg-Chatham J8G
Brunswick E4C, E4Z
Buffalo Point 36 R0A
Burlington L7L, L7M, L7N, L7P, L7R, L7S, L7T
Burnaby V3J, V3K, V3N, V5A, V5B, V5C, V5E, V5G, V5H, V5J, V5K, V5M, V5R, V5S
Burrard Inlet 3 V7G, V7H
Burton E2V
Cache Creek V0K
Caledon L7C, L7E, L7K
Cambridge E4C
Cambridge 32 B0P
Cambridge-Narrows E4C
Campbell River V9H, V9W
Campbell River 11 V9W
Campobello Island E5E
Canning E4B
Canterbury E6H, E6L
Cantley J8M, J8V, J9J
Cape Breton B1A, B1B, B1C, B1E, B1G, B1H, B1J, B1K, B1L, B1M, B1N, B1P, B1R, B1S, B1T, B1V, B1Y, B2A
Capilano 5 V7P, V7T
Cap-Pelé E4N
Cardwell E4E, E4G, E4Z
Carignan J3L
Carleton E1N, E4X, E9A
Carleton Place K7C
Carman R0G
Cartier R0G, R4K
Cartwright-Roblin R0K
Castlegar V1N
Cavan Monaghan L0A, K0L
Central Frontenac K0H
Central Kootenay A V0B
Central Kootenay B V0B
Central Kootenay D V0G
Central Kootenay E V1L
Central Kootenay F V0G
Central Kootenay H V0G
Central Kootenay I V1N
Central Kootenay J V0G, V1N
Central Kootenay K V0G
Central Okanagan V1P, V1X
Central Okanagan J V0H, V1H, V1Z
Central Saanich V8M, V8W, V8Y, V8Z
Centre Hastings K0K
Centreville  E7K
Châteauguay J6J, J6K
Chambly J3L
Champlain K0B, K6A
Chapple P0W
Chatham-Kent N0P, N8A
Chelsea J9B
Chemainus 13 V9G
Chester B0J
Chilliwack V0X, V2P, V2R, V4Z
Chipman E4A
Chippewas of the Thames First Nation 42 N0L
Chopaka 7 & 8 V0X
Clare B0W, B5A
Clarence-Rockland K0A
Clarendon E5L
Clarington L0A, L0B, L1C, L1E
Clearview L0M, L9Y
Clearwater V0E
Cobourg K9A
Cocagne E4R, E4S, E4T, E4V
Colchester, Subd. A B0M
Colchester, Subd. B B0K, B0M, B2N, B6L
Colchester, Subd. C B0N, B2N, B6L
Coldstream V1B
Cole Bay 3 V8L
Cole Harbour 30 B2V
Collingwood L9Y
Columbia-Shuswap C V0E, V1E
Columbia-Shuswap D V0E, V1E
Columbia-Shuswap E V0E
Columbia-Shuswap F V0E
Colwood V9B, V9C
Comox V0R, V9M
Comox 1 V9M, V9N
Comox Valley A V0R, V9N
Comox Valley B (Lazo North) V9J, V9M, V9N
Comox Valley C (Puntledge - Black Creek) V0R, V9H, V9J, V9N
Coquitlam V3B, V3C, V3E, V3H, V3J, V3K
Cornwall K6H, K6J, K6K
Cornwallis R0K
Courtenay V9J, V9N
Coverdale E1J, E4J
Cowansville J2K
Cowichan V9L
Cowichan Valley A V0R
Cowichan Valley B V0R, V9L
Cowichan Valley C V0R
Cowichan Valley D V0R, V9L
Cowichan Valley E V9L
Cowichan Valley F V0R, V9L
Cowichan Valley G V0R, V9G
Cowichan Valley H V9G
Cowichan Valley I V0R, V9L
Cramahe K0K
Cranbrook V1C
Creston V0B
Cumberland V0R
Cumberland, Subd. A B0L, B0M
Cumberland, Subd. B B0L, B0M, B4H
Cumberland, Subd. C B0K, B0L, B0M, B4H 
Cumberland, Subd. D B0K, B0M
Danville J0A, J1T
Dawson P0W
De Salaberry R0A
Delta V3M, V3W, V4C, V4E, V4G, V4K, V4L, V4M
Devon 30 E3A
Dieppe E1A, E1C, E1H
Digby B0S, B0V, B0W
Division No. 17, Unorganized R0J
Dollard-Des Ormeaux H8Y, H9A, H9B, H9G, H9H
Dorchester E1H, E4K
Dorval H4S, H4Y, H9P, H9R, H9S
Douglas E3A, E3G, E6B, E6L
Drummond/North Elmsley K0G, K7A, K7C, K7H
Drummondville J1Z, J2A, J2B, J2C, J2E
Duck Lake 7 V4V
Dufferin E3L
Dumbarton E5A, E6K
Dumfries E6G
Duncan V9L
Dundas E1G, E4R, E4V, K0A, K0C, K0E
Dunham J0E
East Farnham J2K
East Gwillimbury L0G, L9N
East Hants B0N, B2S, B2T
East Hawkesbury K0B, K6A
East Kootenay B V0B
East Kootenay C V0B, V1C
East Kootenay E V1A
East Saanich 2 V8M
East St. Paul R2E
Edwardsburgh/Cardinal K0E, K0G
Elgin E4J, E4Z, J0S
Elizabethtown-Kitley K0E, K0G, K6T, K6V
Emerson-Franklin R0A
Enderby V0E
Erin N0B
Eskasoni 3 B1W
Esquimalt V9A
Essa L9R
Essex N0R, N8M, N9V, N9Y
Farnham J2N
Florenceville-Bristol E7K, E7L
Fort-Coulonge J0X
Fort Erie L0S, L2A
Fort Folly 1 E4K
Fort Frances P9A
Fort William 52 P7J
Franklin J0S
Fraser Valley A V0K
Fraser Valley B V0K, V0X
Fraser Valley C V0M
Fraser Valley D V0X
Fraser Valley E V2R, V4Z
Fraser Valley F V2V
Fraser Valley G V0M, V2V
Fraser Valley H V2R
Fredericton E3A, E3B, E3C, E3E, E3G
Fredericton Junction E5L
Frelighsburg J0J
Frontenac Islands K0H, K7G
Fruitvale V0G
Gagetown E5M
Gananoque K7G
Gatineau J8L, J8M, J8P, J8R, J8T, J8V, J8X, J8Y, J8Z, J9A, J9H, J9J, K1A
Georgian Bluffs N0H
Georgina L0C, L0E, L4P
Gibsons V0N
Gladstone E5L
Godmanchester J0S
Gold River V0P
Granby J2G, J2H, J2J
Grand Bay-Westfield E5K
Grand Forks V0H
Grand Manan E5G
Greater Madawaska K0J, K7V
Greater Napanee K0K, K7R
Greater Vancouver A V4N, V6S, V6T, V7W
Greenwich E1V, E5K, E5M
Greenwood V0H
Grenville J0V
Grenville-sur-la-Rouge J0V
Grey R0G
Guelph N1C, N1G, N1L
Guelph/Eramosa N0B, N1H
Guysborough B0E, B0H
Haldimand County N0A, N1A, N3W
Halifax B0J, B0N, B1S, B2R, B2S, B2T, B2V, B2W, B2X, B2Y, B2Z, B3A, B3B, B3E, B3G, B3H, B3J, B3K, B3L, B3M, B3N, B3P, B3R, B3S, B3T, B3V, B3Z, B4A, B4B, B4C, B4E, B4G
Halton Hills L0P, L6Y, L7G, L7J, L9T
Hamilton K0K,  K0L, K9A, L0P, L0R, L1A, L8B, L8E, L8G, L8H, L8J, L8K, L8L, L8M, L8N, L8P, L8R, L8S, L8T, L8V, L8W, L9A, L9B, L9C, L9G, L9H, L9K
Hammond E4E
Hampstead E5M
Hampton E2S, E5N
Hanover R0A, R5G
Hanwell E3B, E3C, E3E, E6K
Harcourt E4T
Harrison Hot Springs V0M
Harrison Park R0J
Hartland E7P
Harvey E4H, E6K
Hatley J0B, J1M
Havelock E4G, E4Z, J0S
Hawkesbury K6A
Headingley R4H, R4J
Hemmingford J0L
Henryville J0J
Highlands V9B, V9E
Hillsborough E1J, E4H
Hinchinbrooke J0S
Homalco 9 V9H
Hope V0X
Hopewell E4H
Horton K7V
Huskisson E4T
Indian Brook 14 B0N
Indian Island 28 E4W
Ingersoll N5C
Innisfil L0L, L9S
Inverness, Subd. A B0E
Inverness, Subd. B B0E
Inverness, Subd. C B0E, B9A
Johnston E4C
Juan de Fuca (Part 1) V9E, V9Z
Juan de Fuca (Part 2) V0S, V9Z
Kahnawake J0L
Kamloops V1S, V2B, V2C, V2E, V2H
Kamloops 1 V2H
Kars E5T
Katzie 1 V3Y
Kawartha Lakes L0A, K0M, K9V
Kelowna V1P, V1V, V1W, V1X, V4V
Kenora P0X, P9N
Kenora 38B P9N
Kenora, Unorganized P0X, P9N
Kent V0M, E7J, E7L
Kentville B4N
Keremeos V0X
Killarney - Turtle Mountain R0K
Kimberley V1A
Kincardine N0G, N2Z
King L0G, L3Y, L7B, L7E, L9N
Kings, Subd. A B0P, B4N, B4R
Kings, Subd. B B0P, B4N
Kings, Subd. C B4N, B4P, B4R
Kings, Subd. D B0P, B4P
Kingsclear E3C, E3E, E6K
Kingsclear 6 E3E
Kingston E2E, E5N, E5S, K0H, K7K, K7L, K7M, L7P 
Kingsville N0P, N0R, N8H, N8M, N9Y
Kirkland H9H, H9J
Kootenay Boundary A V1R
Kootenay Boundary B / Lower Columbia-Old-Glory V0G, V1R
Kootenay Boundary C / Christina Lake V0H
Kootenay Boundary D / Rural Grand Forks V0H
Kootenay Boundary E / West Boundary V0H
Kwawkwawapilt 6 V2P
La Broquerie R0A
La Prairie J5R
La Pêche J0X
Lac-Brome J0E
Lachute J8H
Lacolle J0J
Ladysmith V9G
Lake Country V4V
Lake Cowichan V0R
Lake of the Woods P0W
Lakeshore N8M, N8N, N9K, R0L, R7N
Lambton Shores N0M, N0N
Lanark Highlands K0A, K0G
L'Ange-Gardien J8L
Langford V9B, V9C
Langley V0X, V1M, V2Y, V2Z, V3A, V4W
Lantzville V0R
LaSalle N9A, N9H, N9J
Laval H7A, H7B, H7C, H7E, H7G, H7H, H7J, H7K, H7L, H7M, H7N, H7P, H7R, H7S, H7T, H7V, H7W, H7X, H7Y
Leamington N8H
Leeds and the Thousand Islands K0E, K7G
Lepreau E5J
L'Île-Dorval H9S
L'Île-du-Grand-Calumet J0X
Lillooet V0K
Lincoln E3B, L0R, L2R
Lions Bay V0N
Lockeport B0T
London N5V, N5W, N5X, N5Y, N5Z, N6A, N6B, N6C, N6E, N6G, N6H, N6J, N6K, N6L, N6M, N6N, N6P
Long Plain (Part) 6 R0H
Longueuil J3Y, J3Z, J4G, J4H, J4J, J4K, J4L, J4M, J4N, J4P, J4R, J4T, J4V
Lorne R0G, R0K
Louise R0G, R0K
Loyalist K0H, K7N
Lumby V0E
Lunenburg B0J, B0R, B4V
Lytton V0K
Macdonald R0G, R4G
Magog J1X
Malahide N5H
Manners Sutton E6K
Mansfield-et-Pontefract J0X
Maple Ridge V2W, V2X, V4R
Marieville J3M
Markham L3P, L3R, L3S, L3T, L6B, L6C, L6E, L6G
Marktosis 15 V0R
Matsqui Main 2 V4X
Maugerville E3A
McAdam E6J
McCreary R0J
McNab/Braeside K0A, K7S
Meductic E6H
Membertou 28B B1M, B1P, B1S
Memramcook E4K
Merrickville-Wolford K0G
Merritt V1K
Metchosin V8X, V9C
Middlesex Centre N0L, N0M, N5X, N6H, N6P
Midland L4R
Midway V0H
Millbrook 27 B2N, B6L
Millville E6E
Milton L0P, L9E, L9T
Minden Hills K0M
Minnedosa R0J
Minto E4B
Minto-Odanah R0J
Mirabel J7N
Mission V2V, V4S
Mission 1 V7J
Mississauga L4T, L4V, L4W, L4X, L4Y, L4Z, L5A, L5B, L5C, L5E, L5G, L5H, L5J, L5K, L5L, L5M, L5N, L5P, L5R, L5S, L5T, L5V, L5W, M7R
Mississippi Mills K0A, K7C
Moncton E1A, E1C, E1E, E1G, E1H, E4P, E4T, E4V
Mono L9R
Montague K7A
Montréal  H1A, H1B, H1C, H1E, H1G, H1H, H1J, H1K, H1L, H1M, H1N, H1P, H1R, H1S, H1T, H1V, H1W, H1X, H1Y, H1Z, H2A, H2B, H2C, H2E, H2G, H2H, H2J, H2K, H2L, H2M, H2N, H2P, H2R, H2S, H2T, H2V, H2W, H2X, H2Y, H2Z, H3A, H3B, H3C, H3E, H3G, H3H, H3J, H3K, H3L, H3M, H3N, H3P, H3R, H3S, H3T, H3V, H3W, H3X, H3Y, H3Z, H4A, H4B, H4C, H4E, H4G, H4H, H4J, H4K, H4L, H4M, H4N, H4P, H4R, H4S, H4T, H4V, H4W, H4X, H4Y, H4Z, H5A, H5B, H8N, H8P, H8R, H8S, H8T, H8Y, H8Z, H9A, H9C, H9E, H9H, H9J, H9K, H9P
Mont-Saint-Hilaire J3G, J3H
Morden R6M
Mount Waddington A V0P
Mount Waddington C V0N
Mount Waddington D V0N
Mountain (North) R0L
Musquash E5J
Musqueam 2 V6N
Nackawic E6G
Nakusp V0G
Nanaimo V9R, V9S, V9T, V9V, V9X
Nanaimo A V0R, V9G, V9R, V9X
Nanaimo B V0R, V9R
Nanaimo C V9R, V9S, V9T, V9X
Nanaimo E V9P
Nanaimo F V0R, V9K, V9P
Nanaimo G V9K, V9P
Nanaimo H V0R, V9K
Nanaimo River V9X
Nanaimo Town 1 V9R
Neepawa R0J
Neskonlith V0E
New Credit (Part) 40A N0A
New Glasgow B2H
New Maryland E3B, E3C
New Songhees 1A V9A
New Tecumseth L0G, L9R
New Westminster V3L, V3M
Newmarket L3X, L3Y
Niagara Falls L2E, L2G, L2H, L2J
Niagara-on-the-Lake L0S, L2R
Nicola Mameet 1 V0K, V1K
Niverville R0A
Nooaitch 10 V1K
Norfolk County N0A, N0E, N0J, N3Y, N4B, N4G
Norfolk-Treherne R0G
North Bay 5 V0E
North Cowichan V0R, V9L
North Dundas K0A, K0C, K0E
North Glengarry K0B, K0C
North Grenville K0G
North Kawartha K0L
North Lake E6H, E7N
North Norfolk R0H
North Okanagan B V1B, V1H
North Okanagan C V1B
North Okanagan D V0E, V1B
North Okanagan E V0E
North Okanagan F V0E, V1E
North Saanich V8L
North Stormont K0A, K0C
North Vancouver V7G, V7H, V7J, V7K, V7L, V7M, V7N, V7P, V7R
Northampton E7N
Northfield E4A, E4B
Norton E4E, E5N, E5T
Norwich N0J, N4G, N4S
Oak Bay V8P, V8R, V8S
Oakville L6H, L6J, L6K, L6L, L6M
Odanak J0G
Oka J0N
Okanagan (Part) 1 V1H
Okanagan-Similkameen A V0H
Okanagan-Similkameen B V0X
Okanagan-Similkameen C V0H
Okanagan-Similkameen D V0H, V2A
Okanagan-Similkameen E V0H, V2A
Okanagan-Similkameen F V2A
Okanagan-Similkameen G V0X
Oliver Paipoonge P0T, P7B, P7C, P7G, P7J, P7K
Orillia L3V
Ormstowm J0S
Oro-Medonte L0K, L0L, L3V, L4M, L4R
Oromocto E2V
Oromocto 26 E2V
Oshawa L1G, L1H, L1J, L1K, L1L 
Osoyoos V0H
Otonabee-South Monaghan K9J
Ottawa K0A, K1A, K1B, K1C, K1E, K1G, K1H, K1J, K1K, K1L, K1M, K1N, K1P, K1R, K1S, K1T, K1V, K1W, K1X, K1Y, K1Z, K2A, K2B, K2C, K2E, K2G, K2H, K2J, K2K, K2L, K2M, K2P, K2R, K2S, K2T, K2V, K2W, K4A, K4B, K4C, K4M, K4P
Oyster Bay 12 V9G
Parksville V9P
Peachland V0H
Peel E7L
Peelee N0R
Pelham L0S, L3C
Pemberton V0N
Pembina R0G
Penelakut Island 7 V0R
Penetanguishene L9M
Pennfield E5C, E5H, E5J
Penticton V2A
Penticton 1 V2A
Perth K7H
Petersville E5K, E5L
Petitcodiac E4Z
Pickering L0H, L1V, L1W, L1X, L1Y
Pictou, Subd. A B0K
Pictou, Subd. B B0K, B2H
Pictou, Subd. C B0K, B2H
Pinawa R0E
Piney R0A
Pitt Meadows V3Y
Pointe-Claire H4Y, H9P, H9R, H9S
Pointe-Fortune J0P
Pontiac J0X
Port Alberni V9Y
Port Colborne L0S, L3K
Port Coquitlam V3B, V3C, V3E
Port Elgin E4M
Port Hawkesbury B9A
Port Hope L0A, L1A
Port Moody V3H
Portage la Prairie R0H, R1N
Portage-du-Fort J0X
Potton J0E
Powell River V8A
Powell River A V0N, V8A
Powell River B V8A
Powell River C V8A
Powell River D V0N
Powell River E V0R
Prairie Lakes R0K
Prairie View R0J, R0M
Prince Edward County K0K, K8N
Prince William E6K
Princeton V0X
Puslinch N0B, N1H
Quaaout 1 V0E
Qualicum V9K
Qualicum Beach V9K
Quatsino Subdivision 18 V0N
Queens B0J, B0T, B4V
Queensbury E6E, E6G, E6L
Quinsam 12 V9H
Quinte West K0K, K8N, K8R, K8V
Quispamsis E2E, E2G, E2S
Rainy River P0W
Rainy River, Unorganized P9A
Renfrew K7V
Rexton E4W
Rhineland R0G
Richelieu J3L
Richibucto E4S, E4W
Richibucto 15 E4T, E4W
Richmond V6V, V6W, V6X, V6Y, V7A, V7B, V7C, V7E, E7M, E7N
Richmond Hill L3T, L4B, L4C, L4E, L4G, L4S
Richmond, Subd. A B0E, B9A
Richmond, Subd. B B0E, B2E, B2J
Richmond, Subd. C B0E
Rideau Lakes K0E, K0G, K7A
Rigaud J0P
Ritchot R0A, R2N, R5A
Riverside-Albert E4H
Riverview E1B
Rockwood R0C
Rossland V0G
Rothesay E2E, E2H, E2S
Roxton Pond J0E
Russell K4R
Russell-Binscarth R0J
Saanich V8N, V8P, V8R, V8W, V8X, V8Y, V8Z, V9A, V9E
Sackville E4K, E4L
Saint Andrews E5B
Saint Croix E3L, E5B
Saint David E3L, E5A
Saint George E5C
Saint James E3L, E5A
Saint John E2E, E2H, E2J, E2K, E2L, E2M, E2N, E2P, E2R, E2S
Saint Martins E5N, E5R
Saint Mary E1G, E4S, E4T, E4V, E4W
Saint Marys E3A, E6C
Saint Patrick E5A, E5B, E5C
Saint Stephen E3L
Saint-Alphonse-de-Granby J0E
Saint-André-d'Argenteuil J0V
Saint-Anicet J0S
Sainte-Anne-de-Bellevue H9X
Saint-Antoine E4V
Saint-Armand J0J
Saint-Basile-le-Grand J3N
Saint-Bernard-de-Lacolle J0J
Saint-Blaise-sur-Richelieu J0J
Sainte-Brigide-d'Iberville J0J
Saint-Bruno-de-Montarville J3V
Sainte-Catherine-de-Hatley J0B
Sainte-Cécile-de-Milton J0E
Saint-Charles E4T, E4W, E4X
Saint-Chrysostome J0S
Sainte-Christine J0H
Sainte-Clotilde J0L
Sainte-Hélène-de-Bagot J0H
Saint-Dominique J0H
Saint-Étienne-de-Beauharnois J0S
Saint-Eugène J0C
Saint-Louis E4X
Saint-Louis de Kent E4W, E4X
Saint-Lucien J0C
Sainte-Julie J3E
Sainte-Justine-de-Newton J0P
Sainte-Marthe J0P
Saint-Michel J0L
Saint-Georges-de-Clarenceville J0J
Saint-Hyacinthe J2R, J2S, J2T
Saint-Jean-sur-Richelieu J0J, J2W, J2X, J2Y, J3A, J3B
Saint-Joachim-de-Shefford J0E
Saint-Majorique-de-Grantham J2B, J2E
Saint-Patrice-de-Sherrington J0L
Saint-Paul E4T
Saint-Paul-d'Abbotsford J0E
Saint-Pie J0H
Saint-Placide J0V
Saint-Stanislas-de-Kostka J0S
Saint-Théodore-d'Acton J0H
Saint-Valérien-de-Milton J0H
Saint-Valentin J0J
Saint-Étienne-de-Beauharnois J0S
Salaberry-de-Valleyfield J6S, J6T
Salisbury E1G, E4E, E4J, E4Z
Salmon Arm V0E, V1E
Saltspring Island V8K
Saugeen Shores N0H
Scugog L9L
Sechelt V0N
Sechelt (Part) V0N, V8A
Selkirk R1A
Semiahmoo V3Z
Senneville H9X
Severn L0K, L3V
Seymour Creek 2 V7J, V7L
Shackan 11 V1K
Shediac E1H, E4P, E4R
Sheffield E3A, E4B
Shefford J2M
Shelburne B0T, B0W
Sherbrooke J1C, J1E, J1G, J1H, J1J, J1K, J1L, J1M, J1N, J1R
Shoal Lake (Part) 39A P0X
Shuniah P7A
Sicamous V0E
Sidney V8L
Simonds E2J, E2S, E5N, E5R, E7K, E7L, E7P
Six Nations (Part) 40 N0E
Skowkale V2R, V4Z
Skway 5 V2R
Sliammon 1 V8A
Smiths Falls K7A
Sooke V9Z
Soowahlie 14 V2R
Sorel-Tracy J3P, J3R
Souris-Glenwood R0K
South Bruce Peninsula N0H
South Dundas K0C, K0E
South Frontenac K0H
South Glengarry K0C, K6H
South Huron N0M
South Saanich 1 V8M
South Stormont K0C, K6H, K6K
Southampton E6E, E6G, E7N
Southern Gulf Islands V0N, V8L
South-West Oxford N0L, N4G, N0J, N4S, N5C
Southwold N5P
Spallumcheen V0E, V1B, V1H
Springfield E4C, E5N, E5P, E5T, R0E, R2C, R2E, R2J, R3X, R5L, R5M, R5N, R5P, R5R, R5T
Springwater L0L, L4M, L9X
Squamish V0N, V8B
Squamish-Lillooet C V0N
Squamish-Lillooet D V0N
Squiaala V2P
St. Andrews R0C, R1A
St. Catharines L2M, L2N, L2P, L2R, L2S, L2T, L2W
St. Clements R0E, R1A, R1B, R1C, R2E
St. François Xavier R4L
St. George E5C
St. Martins E5R
St. Mary's B0H, B0J
St. Stephen E3L
Stanbridge East J0J
Stanley E6B, E6C, R0G, R6M, R6W
Stanstead J0B, J1X
Ste. Anne R0A, R0E, R5G, R5H
Stellarton B0K, B2H
Stirling-Rawdon K0K
Stone Mills K0K
St-Pierre-Jolys R0A
Strathcona A V0P, V9H, V9W
Strathcona B V0P
Strathcona C V0P
Strathcona D (Oyster Bay - Buttle Lake) V9H, V9W
Strathroy-Caradoc N0L, N7G
Stuartburn R0A
Studholm E4G, E5P
Summerland V0H
Sunshine Coast A V0N
Sunshine Coast B V0N
Sunshine Coast D V0N
Sunshine Coast E V0N
Sunshine Coast F V0N
Surrey V3R, V3S, V3T, V3V, V3W, V3X, V3Z, V4A, V4N, V4P 
Sussex E4E, E4G, E5P, E5T
Sussex Corner E4E, E4G
Sutton J0E
Switsemalph V1E
Switsemalph 3 V1E
Taché R0A, R0G, R5H, R5J, R5K
Tay L0K, L4R
Tay Valley K7H
Tecumseh N0R, N8N, N8P, N8T, N9A, N9K
Terrebonne J5M, J6V, J6W, J6X, J6Y, J7M
The Nation / La Nation K0A
The Blue Mountains L9Y
Thames Centre N0L, N0M, N5V, N6M
Thompson R0G
Thompson-Nicola I (Blue Sky Country) V0K
Thompson-Nicola J (Copper Desert Country) V0K, V1S
Thompson-Nicola L (Grasslands) V0E, V2C
Thompson-Nicola M (Beautiful Nicola Valley - North) V1K
Thompson-Nicola N (Beautiful Nicola Valley - South) V1K
Thompson-Nicola O (Lower North Thompson) V0E
Thompson-Nicola P (Rivers and the Peaks) V0E, V2B, V2C, V2H
Thorold L0S, L2V, L3B
Thunder Bay P7A, P7B, P7C, P7E, P7G, P7J, P7K
Thunder Bay, Unorganized P7B, P7G
Tillsonburg N4G
Tiny L0K, L0L, L9M
Tofino V0R
Toronto M1B, M1C, M1E, M1G, M1H, M1J, M1K, M1L, M1M, M1N, M1P, M1R, M1S, M1T, M1V, M1W, M1X, M2H, M2J, M2K, M2L, M2M, M2N, M2P, M2R, M3A, M3B, M3C, M3H, M3J, M3K, M3L, M3M, M3N, M4A, M4B, M4C, M4E, M4G, M4H, M4J, M4K, M4L, M4M, M4N, M4P, M4R, M4S, M4T, M4V, M4W, M4X, M4Y, M5A, M5B, M5C, M5E, M5G, M5H, M5J, M5K, M5L, M5M, M5N, M5P, M5R, M5S, M5T, M5V, M5W, M5X, M6A, M6B, M6C, M6E, M6G, M6H, M6J, M6K, M6L, M6M, M6N, M6P, M6R, M6S, M7A, M7Y, M8V, M8W, M8X, M8Y, M8Z, M9A, M9B, M9C, M9L, M9M, M9N, M9P, M9R, M9V, M9W
Très-Saint-Rédempteur J0P
Tracy E5L
Trail V1R
Trent Hills K0K, K0L
Trenton B0K
Truro B2N
Tsahaheh 1 V9Y
Tsawwassen V4L, V4M
Tsinstikeptum  9 V1Z, V4T
Tsinstikeptum 10 V1Z
T'Sou-ke V9Z
Tweed K0K
Tyendinaga K0K
Tzeachten 13 V2R
Ucluelet V0R
Union Bay 4 V8L
Upham E4E, E5N
Upper Miramichi E6A, E6C
Upper Sumas 6 V3G
Upton J0H
Uxbridge L0C, L0E, L4A, L9P 
Val-des-Monts J8N
Vancouver V5K, V5L, V5M, V5N, V5P, V5R, V5S, V5T, V5V, V5W, V5X, V5Y, V5Z, V6A, V6B, V6C, V6E, V6G, V6H, V6J, V6K, V6L, V6M, V6N, V6P, V6R, V6S, V6T, V6Z, V7X, V7Y
Vaudreuil-Dorion J7T, J7V
Vaughan L0J, L3L, L3T, L4H, L4J, L4K, L4L, L6A
Venise-en-Québec J0J
Vernon V1B, V1H, V1T
Victoria V8P, V8R, V8S, V8T, V8V, V8W, V8X, V8Z, V9A, V9B, V9C
Victoria, Subd. A B0C
Victoria, Subd. B B0E, B1X, B1Y, B2C
View Royal V8Z, V9A, V9B, V9C
Wagmatcook 1 B0E
Wainfleet L0R, L0S, N0A
Wakefield E7M, E7P
Warfield V1R
Wasaga Beach L9Z
Waterborough E4A, E4C
Waterford E4E, E4H
Waterloo J0E
Weldford E4S, E4T, E4W, E4Y
Welland L3B, L3C
Wellington E4R, E4S, E4V
West Hants B0N, B0P
West Isles E5V
West Kelowna V1Z, V4T
West Lincoln L0R
West St. Paul R2V, R4A
West Vancouver V7P, V7S, V7T, V7V, V7W
Westfield E5K, E5S
Westmorland E4L, E4M
Westville B0K
Whispering Pines 4 V2B
Whitby L0B, L1M, L1N, L1P, L1R
Whitchurch-Stouffville L0H, L4A
White Rock V4A, V4B
Whitehead R7A
Whitewater Region K0J, K7V
Wickham E4C, E5T, J0C
Wicklow E7H, E7K, E7L
Wilmot E7K
Windsor B0N, N0R, N8N, N8P, N8R, N8S, N8T, N8V, N8W, N8X, N8Y, N9A, N9B, N9C, N9E, N9G, N9H, N9J
Winkler R6W
Winnipeg R2C, R2E, R2G, R2H, R2J, R2K, R2L, R2M, R2N, R2P, R2R, R2V, R2W, R2X, R2Y, R3A, R3B, R3C, R3E, R3G, R3H, R3J, R3K, R3L, R3M, R3N, R3P, R3R, R3S, R3T, R3V, R3W, R3X, R3Y, R4A
Winnipeg Beach R0C
Wolfville B4P
Woodstock E7H, E7M, E7N, N4S, N4T, N4V
Woodstock 23 E7M
Yamaska J0G
Yarmouth B0W, B5A
Yarmouth 33 B5A
Zorra N0M, N4S, N5C

Or use our interactive map with your postal code, municipality or province to check if you're in a risk area.

Lyme disease risk areas map

The following map displays areas where tick populations may be emerging and the areas where people are most at risk of getting Lyme disease.

Figure 1. Cross-section map of 5 areas known for risk to tick exposure, 2023
Figure 1. Text version below.
Figure 1: Text description

This figure contains 5 cross-sections which display locations where the risk:

  • from tick bites is known to occur
  • for Lyme disease is possible

Circled hatched areas are locations where tick risk is known and are called risk areas.

Cross-section 1: Southern Manitoba and Western Ontario

Risk areas can be found stretching:

  • from the Ontario border west to Turtle Mountain Provincial Park
  • from the U.S. border extending to the south shores of Lake Manitoba, Lake Winnipeg and into southern parts of the Interlake

Cross-section 2: Southern Ontario

Risk areas can be found along the north shores of Lake Erie and Lake Ontario, and on the south shore of Lake Huron.

Cross-section 3: Southeastern Ontario and Southern Quebec

Risk areas can be found around Kingston in the Saint Lawrence valley that extend northeast towards Ottawa, locations covering:

  • much of Montérégie
  • parts of Outaouais, Estrie and Centre du Québec in the south of Québec

Cross-section 4: Maritime provinces

In New Brunswick, risk areas can be found in the counties of:

  • York
  • Charlotte
  • Sunbury
  • Queens
  • Saint John
  • Kings
  • Albert
  • Westmorland
  • Kent
  • Carleton

All of Nova Scotia is found to be a risk area.

Cross-section 5: Southern British Columbia

Risk areas can be found in:

  • much of Vancouver Island and the coast of British Columbia facing Vancouver Island
  • river valleys across southern British Columbia

Surveillance resources, reports and publications

Related links

Page details

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