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about population estimates data

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  • For each data source, information about data collection and analytical methods, limitations, the citation and additional resources can be found on the Data Sources and Methods page.


Original Source:Statistics Canada
Distributed by: Ontario Ministry of Health and Long-Term Care: IntelliHEALTH Ontario.
Cite as: Population Estimates, 1986-2016, Statistics Canada. IntelliHEALTH Ontario, Ministry of Health and Long-Term Care.


Data Collection Methods

  • The population estimates used to calculate rates are produced by the Demography Division, Statistics Canada, and are based on the 1986, 1991, 1996, 2001, 2006 and 2011 census counts adjusted for net under-coverage. Population estimates for 1986 to 2000 are final inter-censal estimates that were interpolated using the adjusted census counts from the 2006 census; population estimates for 2001 to 2012 use the 2011 census.
  • Population estimates for 2012 onwards are extrapolated by applying the growth rates by age and sex of each Census Division (CD) to the Census Subdivisons that comprise that CD.
  • Statistics Canada estimates what the population is on July 1st each year.
  • Post-censal estimates are based on the most recent census counts adjusted for net under-coverage and changes in the population between Census Day and July 1st. These estimates consider data on births, deaths, international migration and internal migration when these data are available (component method). Preliminary estimates using a regression model are released for current years and then revised using the component method.
  • When the population estimates for a new census year are ready, post-censal estimates for the years between the last two censuses are revised as inter-censal estimates.
  • Population estimates are available at the Census Subdivision (CSD) level.

Data Analysis Methods

  • Population estimates are used to calculate both crude and age-standardized rates.
  • To generate crude rates and age-standardized rates for Peel or Peel municipalities compared to Peel Data Zones, Census data extrapolated using the straight-line method have been applied.


  • Because of the delay in updating population estimates following a census, estimates may differ from the census counts.


  1. Ontario Population Estimates: Highlights. PHERO, Vol. 3, No. 5, pp. 72-73, March 13, 1992
  2. Bender R. Impact of New Population Estimates on Health and Vital Statistics, Health Reports 1995;7(1):7-18
  3. Bains N, Ranger R. A comparison of Population Estimates and Population Projections for Eastern Ontario. Health Information Partnership Eastern Ontario Region, 2001.
  4. Statistics Canada. Estimates of population for Census Subdivisions (CSD) Methodology. Ottawa, ON: Statistics Canada, 2004.

Last updated: February 12, 2019

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