Share of the population by age and sex, five-year groups

Population of Connecticut, 2010–2025 · click to pick a year
Estimates up to 2019 are built on the 2010 Census, those from 2020 on the 2020 Census. A line that steps up or down between 2019 and 2020 reflects this re-basing, not a sudden change in population.

Year

-5 -1   2010  +1 +5

3,579,173 people lived in Connecticut on July 1, 2010: the 29th-largest population among the 50 states and the District of Columbia. The median age was 40.0 years (United States: 37.2); children under 15 (18.5%) clearly outnumber residents 65 and older (14.2%): a relatively young population. There were 94.9 men for every 100 women. Source: U.S. Census Bureau, Population Estimates Program, Vintage 2020 estimates (resident population on July 1; public domain). Median age, shares, dependency ratios and rankings are calculated by PopulationPyramid.net from these estimates; the Census Bureau does not endorse this site.

Key indicators, 2010
Population
3,579,173
Rank by population
29th of 51
Median age
40.0
Men per 100 women
94.9
Under 15
18.5%
15–64
67.3%
65 and over
14.2%
Child dependency
27.5
Old-age dependency
21.1
Dependency ratios count children under 15 or adults 65 and over per 100 residents aged 15 to 64.
Show the population by age group, 2010
AgeMenWomenTotalShare
0-4103,01898,245201,2635.6%
5-9113,402108,424221,8266.2%
10-14122,592117,019239,6116.7%
15-19130,134123,453253,5877.1%
20-24117,865111,310229,1756.4%
25-29108,536106,485215,0216.0%
30-34102,478104,475206,9535.8%
35-39107,687112,550220,2376.2%
40-44126,756133,668260,4247.3%
45-49141,332149,169290,5018.1%
50-54139,278145,677284,9558.0%
55-59117,730124,576242,3066.8%
60-6497,550107,048204,5985.7%
65-6970,95779,759150,7164.2%
70-7447,62858,576106,2043.0%
75-7937,78051,08988,8692.5%
80-8430,47246,99077,4622.2%
85+27,15558,31085,4652.4%
How Connecticut compares with similar-sized states, 2010
RankStateResidentsRelative
26 Kentucky 4,348,464
27 Oregon 3,837,614
28 Oklahoma 3,760,014
29 Connecticut 3,579,173
30 Iowa 3,050,819
31 Mississippi 2,970,615
32 Arkansas 2,921,998
Frequently asked questions about Connecticut's population
What is the population of Connecticut?
Connecticut had an estimated 3,579,173 residents on July 1, 2010, according to the U.S. Census Bureau, Population Estimates Program. That ranks 29th among the 51 states and the District of Columbia.
What is the median age in Connecticut?
The median age in Connecticut was 40.0 years in 2010, the 7th oldest of the 51 states and DC. That is 2.8 years older than the national median of 37.2.
How many people in Connecticut are 65 or older?
About 508,716 residents of Connecticut (14.2%) were 65 or older in 2010, against 18.5% under 15 and 67.3% aged 15 to 64.
What does the population pyramid of Connecticut show?
In 2010, Connecticut: children under 15 (18.5%) clearly outnumber residents 65 and older (14.2%): a relatively young population. There were 94.9 men for every 100 women.
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