Contact Us

If you require immediate assistance, please call 9-1-1.

General Inquiries

Canadian Security Intelligence Service
Ottawa ON K1G 4G4

Telephone: 613-231-0100
Facsimile: 613-231-0612
TTY and or TDD: 613-991-9228

National Security Tips

CSIS is not a law enforcement agency. To report an immediate threat to national security, please call 911 or your local police department. You can also contact The RCMP's National Security Information Network.

To report a non-immediate threat to national security:

Telephone: 613-993-9620
Facsimile: 613-991-9228

Report a non-immediate threat to national security

Media Inquiries

Telephone: 613-231-0100

Contact media relations

Regional Office Addresses and Phone Numbers

Atlantic Region

P.O. Box 126, Station Central
Halifax NS B3J 3K5
Tel. 902-420-5900

New Brunswick District

P.O. Box 6010, Station A
Fredericton NB E3B 5G4
Tel. 506-452-3786

Newfoundland and Labrador District

P.O. Box 2585, Station C
St. John's NL A1C 6J6
Tel. 709-724-8650

Quebec Region

P.O. Box 2000, Station St-Jacques
Montreal QC H3C 3A6
Tel. 514-393-5600 or 1-877-223-2265 toll-free (Quebec only)

Quebec City District

P.O. Box 10043, Station Sainte-Foy
Quebec QC G1V 4C6
Tel. 418-529-8926

Ottawa Region

P.O. Box 9732, Station T
Ottawa ON K1G 4G4
Tel. 613-998-1679 or 1-800-267-7685 toll-free (Ontario only)

Toronto Region

P.O. Box 760, Station A
Toronto ON M5W 1G3
Tel. 416-865-1480


(Alberta, Saskatchewan, Manitoba, Northwestern Ontario, Yukon, Northwest Territories, Nunavut )
P.O. Box 47009
62 City Centre
Edmonton AB T5J 4N1
Tel. 780-401-7800 or 1-800-661-5780 toll-free (Prairie only)

Calgary District

P.O. Box 2671, Station M
Calgary AB T2P 3C1
Tel. 403-292-5255

Saskatchewan District

P.O. Box 5089, Station Main
Regina SK S4P 4B2
Tel. 306-566-9450

Manitoba District

P.O. Box 771, Station Main
Winnipeg MB R3C 4G3
Tel. 204-954-8120

British Columbia Region

P.O. Box 80629,
South Burnaby BC V5H 3Y1
Tel. 604-528-7400

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