United States Population By State in 2015
Updated on January 27, 2024.
Based on the US Census Vintage data estimates, in 2015, the population of the United States was 320,738,994. Among all US states, California had the highest population (38,904,296), followed by Texas (27,468,531), and then Florida (20,219,111). Wyoming was the least populated state with a population of 586,389.
Hover over or click on the states in the map below to see the number and percentage of the US population that lives in each states. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.
You can also see links at the bottom of the page for the population by county each state.
Related Topics: US Census Vintage Data Topic List.
Data Source: US Census Bureau (Vintage).
See this for other years:
US Population By State in 2015
less than 1M
1M - 2M
2M - 5M
5M - 10M
10M - 15M
Over 15M
US Population By State in 2015
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| State | Population | % of US Population |
|---|---|---|
| Alabama | 4854803 | 1.51 |
| Alaska | 738430 | 0.23 |
| Arizona | 6832810 | 2.13 |
| Arkansas | 2979732 | 0.93 |
| California | 38904296 | 12.13 |
| Colorado | 5454328 | 1.70 |
| Connecticut | 3588561 | 1.12 |
| Delaware | 942065 | 0.29 |
| Florida | 20219111 | 6.30 |
| Georgia | 10183353 | 3.18 |
| Hawaii | 1422999 | 0.44 |
| Idaho | 1652495 | 0.52 |
| Illinois | 12859585 | 4.01 |
| Indiana | 6611442 | 2.06 |
| Iowa | 3122541 | 0.97 |
| Kansas | 2910717 | 0.91 |
| Kentucky | 4429126 | 1.38 |
| Louisiana | 4666998 | 1.46 |
| Maine | 1329098 | 0.41 |
| Maryland | 5988528 | 1.87 |
| Massachusetts | 6797484 | 2.12 |
| Michigan | 9934483 | 3.10 |
| Minnesota | 5484002 | 1.71 |
| Mississippi | 2990231 | 0.93 |
| Missouri | 6075411 | 1.89 |
| Montana | 1031495 | 0.32 |
| Nebraska | 1892059 | 0.59 |
| Nevada | 2868531 | 0.89 |
| New Hampshire | 1337480 | 0.42 |
| New Jersey | 8870312 | 2.77 |
| New Mexico | 2090071 | 0.65 |
| New York | 19657321 | 6.13 |
| North Carolina | 10037218 | 3.13 |
| North Dakota | 755537 | 0.24 |
| Ohio | 11622315 | 3.62 |
| Oklahoma | 3910518 | 1.22 |
| Oregon | 4018542 | 1.25 |
| Pennsylvania | 12789838 | 3.99 |
| Rhode Island | 1056886 | 0.33 |
| South Carolina | 4896006 | 1.53 |
| South Dakota | 854663 | 0.27 |
| Tennessee | 6595354 | 2.06 |
| Texas | 27468531 | 8.56 |
| Utah | 2983626 | 0.93 |
| Vermont | 625810 | 0.20 |
| Virginia | 8367303 | 2.61 |
| Washington | 7167287 | 2.24 |
| West Virginia | 1843332 | 0.57 |
| Wisconsin | 5762927 | 1.80 |
| Wyoming | 586389 | 0.18 |
| District of Columbia | 677014 | 0.21 |
Population of US States By County For Each State in 2015
Use the following links to
to see the population by county for the
following US states in 2015.