DPH: Population Statistics

Population Statistics


Our Population Statistics Overview provides detailed information about each of the population data sources available for Connecticut, limitations of and differences between the datasets, and Q & A examples which may help when choosing a data source.  The US Census Bureau's population estimates terms and definitions may also be helpful.


Annual July 1 Estimates

The Connecticut state, county and town level populations are estimated at the calendar year midpoint (July 1) each year.  These July 1 estimates typically constitute the basis for determining birth, death, and other population based rates. The annual estimate represents the official Connecticut population estimate for the year.


Intercensal Estimates - coming soon

Population estimates produced for the years between two decennial censuses when both the beginning and ending populations are known. They are produced once a decade.


Decennial Census Population Counts

The US Census Bureau takes a census of the population of the United States every 10 years which is known as the decennial census.  A major source of population data for CT, the decennial census attempts to provide a true count of the population rather than an estimate.  The decennial census serves as the population base for the next 9 years of annual estimates


American Community Survey Estimates

The American Community Survey (ACS), conducted by the US Census Bureau, asks essentially the same demographic, social, and economic questions as the decennial census long form but is administered throughout the decade to provide information on a continual basis.  The ACS is conducted in every county of the United States with an annual sample of three million housing units. 


Content Last Modified on 10/3/2012 3:13:26 PM