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

Population of Oklahoma, 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   2021  +1 +5

3,992,760 people lived in Oklahoma on July 1, 2021: the 28th-largest population among the 50 states and the District of Columbia. The median age was 37.3 years (United States: 38.9); children under 15 (19.8%) clearly outnumber residents 65 and older (16.7%): a relatively young population. There were 98.1 men for every 100 women. Since 2010 the population has grown by 6.2%. Source: U.S. Census Bureau, Population Estimates Program, Vintage 2025 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, 2021
Population
3,992,760
Rank by population
28th of 51
Median age
37.3
Men per 100 women
98.1
Under 15
19.8%
15–64
63.4%
65 and over
16.7%
Child dependency
31.3
Old-age dependency
26.4
Change since 2010
+6.2%
Dependency ratios count children under 15 or adults 65 and over per 100 residents aged 15 to 64.
Show the population by age group, 2021
AgeMenWomenTotalShare
0-4126,581120,464247,0456.2%
5-9136,338129,699266,0376.7%
10-14142,868136,287279,1557.0%
15-19141,796134,128275,9246.9%
20-24146,126138,328284,4547.1%
25-29129,986124,722254,7086.4%
30-34133,107131,145264,2526.6%
35-39134,340132,865267,2056.7%
40-44123,618122,121245,7396.2%
45-49111,981111,840223,8215.6%
50-54111,978113,558225,5365.6%
55-59117,868123,125240,9936.0%
60-64120,115129,292249,4076.2%
65-69103,967115,118219,0855.5%
70-7483,73596,612180,3474.5%
75-7953,98666,268120,2543.0%
80-8433,13544,73877,8732.0%
85+26,20744,71870,9251.8%
How Oklahoma compares with similar-sized states, 2021
RankStateResidentsRelative
25 Louisiana 4,628,595
26 Kentucky 4,508,348
27 Oregon 4,254,691
28 Oklahoma 3,992,760
29 Connecticut 3,607,765
30 Utah 3,339,874
31 Iowa 3,199,037
Frequently asked questions about Oklahoma's population
What is the population of Oklahoma?
Oklahoma had an estimated 3,992,760 residents on July 1, 2021, according to the U.S. Census Bureau, Population Estimates Program. That ranks 28th among the 51 states and the District of Columbia.
What is the median age in Oklahoma?
The median age in Oklahoma was 37.3 years in 2021, the 44th oldest of the 51 states and DC. That is 1.6 years younger than the national median of 38.9.
How many people in Oklahoma are 65 or older?
About 668,484 residents of Oklahoma (16.7%) were 65 or older in 2021, against 19.8% under 15 and 63.4% aged 15 to 64.
What does the population pyramid of Oklahoma show?
In 2021, Oklahoma: children under 15 (19.8%) clearly outnumber residents 65 and older (16.7%): a relatively young population. There were 98.1 men for every 100 women.
How fast is the population of Oklahoma changing?
The population of Oklahoma grew by 6.2% between 2010 and 2021, and by 0.7% in the last year.
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