Contact Us

National Headquarters Ottawa:

CSIS
PO BOX 9732 STN T
OTTAWA ON  K1G 4G4

Telephone: 613-993-9620
Fax: 613-231-0612

For people who are deaf or hard of hearing:
TTY and/or TDD *: 613-991-9228

* A TTY --or Teletypewriter, also known as a TDD or Telecommunications device for the deaf-- is a special device that lets people who are deaf, hard of hearing, or speech-impaired use the telephone to communicate, by allowing them to type messages back and forth to one another instead of talking and listening. A TTY is required at both ends of the conversation in order to communicate.

CSIS 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

Prairie

(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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