Census Undercoverage Survey (CUS)

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Start your survey

Have you been invited to participate in this survey via email or mail? To log in to the survey, complete the following steps.

Step 1: Visit the electronic questionnaire portal and select Start my survey.

Step 2: Enter your secure access code (you will find this code in the invitation letter or email you previously received from Statistics Canada).

Step 3: Complete the survey.

Are you missing your secure access code, or do you need help?


(TTY: 1-800-363-7629)
Monday to Friday (except holidays) from 8:00 a.m. to 7:00 p.m., Eastern time

If you use an operator-assisted relay service, you can call us during regular business hours. You do not need to authorize the operator to contact us.



This survey is used to estimate the number of persons missed during the last Census.

Information from the Census Undercoverage Survey is used to calculate accurate population counts, which are used to determine the amount of money transferred from the federal government to your region. Provinces and territories use these funds to help finance many social programs including health care, employment and training, education, public transportation and housing.

Your information may also be used by Statistics Canada for other statistical and research purposes.  In addition, information from partially completed or unsaved questionnaires may be retained and used.

Collection periods:
March to August 2022
Collection methods:
Telephone interview and electronic questionnaire.  Respondents may be contacted by phone, mail or email.
Survey participation:
Mandatory under the Statistics Act
  • Block Information Confidentiality


    Data are collected under the authority of the Statistics Act, Revised Statutes of Canada, 1985, Chapter S-19. Your information will be kept strictly confidential.

    • Block Information Record linkage

      Record linkage

      To enhance the data from this survey and to minimize the reporting burden for respondents, Statistics Canada may combine the information you provide with other survey or administrative data sources.

    • Block Information on Topics covered in the survey

      Topics covered in the survey

      Participants will be asked questions related to addresses where they lived on and around May 11, 2021 as well as information about people living with them.

      Some socio-demographic data are also collected. These data allow for evaluation of census coverage for specific population groups (by age groups, geography, etc.).

    • Block Information on Published data

      Published data

      Statistics Canada publishes the results of its surveys in many formats. The following list includes the latest articles and related documents for this survey:

    • For more information about this survey
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