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

Population of District of Columbia, 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   2015  +1 +5

677,014 people lived in District of Columbia on July 1, 2015: the 49th-largest population among the 50 states and the District of Columbia. The median age was 33.9 years (United States: 37.8); children under 15 (15.3%) clearly outnumber residents 65 and older (11.8%): a relatively young population. There were 90.3 men for every 100 women. Since 2010 the population has grown by 11.9%. 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, 2015
Population
677,014
Rank by population
49th of 51
Median age
33.9
Men per 100 women
90.3
Under 15
15.3%
15–64
72.9%
65 and over
11.8%
Child dependency
20.9
Old-age dependency
16.2
Change since 2010
+11.9%
Dependency ratios count children under 15 or adults 65 and over per 100 residents aged 15 to 64.
Show the population by age group, 2015
AgeMenWomenTotalShare
0-422,65721,79444,4516.6%
5-916,29716,15032,4474.8%
10-1413,27313,23426,5073.9%
15-1917,59719,50437,1015.5%
20-2425,67830,16955,8478.2%
25-2937,71744,59282,30912.2%
30-3436,18339,33375,51611.2%
35-3926,73827,42154,1598.0%
40-4421,06520,82541,8906.2%
45-4918,98118,95337,9345.6%
50-5419,49919,37638,8755.7%
55-5917,81819,08536,9035.5%
60-6414,94418,10333,0474.9%
65-6911,97515,19627,1714.0%
70-748,08510,62218,7072.8%
75-795,3567,71813,0741.9%
80-843,5755,7649,3391.4%
85+3,7288,00911,7371.7%
How District of Columbia compares with similar-sized states, 2015
RankStateResidentsRelative
45 Delaware 942,065
46 South Dakota 854,663
47 North Dakota 755,537
48 Alaska 738,430
49 District of Columbia 677,014
50 Vermont 625,810
51 Wyoming 586,389
Frequently asked questions about District of Columbia's population
What is the population of District of Columbia?
District of Columbia had an estimated 677,014 residents on July 1, 2015, according to the U.S. Census Bureau, Population Estimates Program. That ranks 49th among the 51 states and the District of Columbia.
What is the median age in District of Columbia?
The median age in District of Columbia was 33.9 years in 2015, the 49th oldest of the 51 states and DC. That is 3.9 years younger than the national median of 37.8.
How many people in District of Columbia are 65 or older?
About 80,028 residents of District of Columbia (11.8%) were 65 or older in 2015, against 15.3% under 15 and 72.9% aged 15 to 64.
What does the population pyramid of District of Columbia show?
In 2015, District of Columbia: children under 15 (15.3%) clearly outnumber residents 65 and older (11.8%): a relatively young population. There were 90.3 men for every 100 women.
How fast is the population of District of Columbia changing?
The population of District of Columbia grew by 11.9% between 2010 and 2015, and by 2.0% in the last year.
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