Contact Us

CSIS is warning Canadians that fraudulent phone calls from persons claiming to be CSIS employees are currently being reported. If you receive a call asking for you social insurance number, please be aware that this is a scam. We encourage Canadians to report such instances to the Canadian Anti-Fraud Center by phone at 1-888-495-8501 or here:

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

Reporting National Security Information

Telephone: 613-993-9620 or 1-800-267-7685

TTY and or TDD: 613-991-9228

Report a non-immediate threat to national security

Media Enquiries

Telephone: 613-231-0100

Contact media relations

Recruitment Enquiries

Frequently Asked Questions

General Enquiries

PO Box 9732 STN T
Ottawa ON K1G 4G4

Telephone: 613-993-9620
Facsimile: 613-231-0612
TTY and or TDD: 613-991-9228

Recruitment questions cannot be answered by telephone.

Access to Information and Privacy Coordinator

Toll Free: 1-877-995-9903
Phone: 613-231-0107
Fax: 613-842-1271

Make an access to information or personal information request

Find an office

Atlantic Region

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

British Columbia Region

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

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)

Prairie Region

P.O. Box 47009
Edmonton AB T5J 4N1
Tel. 780-401-7800 or 1-800-661-5780 toll-free (Prairie only)

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)

Toronto Region

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

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