The resident population of U.S is 326,687,501 as of July 1, 2018.
| Resident | 326,687,501 |
| Resident Plus Armed Forces Overseas | 326,923,976 |
| Civilian | 325,500,580 |
| Noninstitutionalized Civilian | 321,627,363 |
| Household | 318,600,417 |
All the data are sourced from US Census Bureau [48]. The definition of Civilian noninstitutional population: US Department of Labor.
The most populated state is California (39,461,588), and the least is Wyoming (577,601) as of July 1, 2018. The below table shows all states population in 2018 [1].
| State | Population |
| Alabama | 4,887,681 |
| Alaska | 735,139 |
| Arizona | 7,158,024 |
| Arkansas | 3,009,733 |
| California | 39,461,588 |
| Colorado | 5,691,287 |
| Connecticut | 3,571,520 |
| Delaware | 965,479 |
| District of Columbia | 701,547 |
| Florida | 21,244,317 |
| Georgia | 10,511,131 |
| Hawaii | 1,420,593 |
| Idaho | 1,750,536 |
| Illinois | 12,723,071 |
| Indiana | 6,695,497 |
| Iowa | 3,148,618 |
| Kansas | 2,911,359 |
| Kentucky | 4,461,153 |
| Louisiana | 4,659,690 |
| Maine | 1,339,057 |
| Maryland | 6,035,802 |
| Massachusetts | 6,882,635 |
| Michigan | 9,984,072 |
| Minnesota | 5,606,249 |
| Mississippi | 2,981,020 |
| Missouri | 6,121,623 |
| Montana | 1,060,665 |
| Nebraska | 1,925,614 |
| Nevada | 3,027,341 |
| New Hampshire | 1,353,465 |
| New Jersey | 8,886,025 |
| New Mexico | 2,092,741 |
| New York | 19,530,351 |
| North Carolina | 10,381,615 |
| North Dakota | 758,080 |
| Ohio | 11,676,341 |
| Oklahoma | 3,940,235 |
| Oregon | 4,181,886 |
| Pennsylvania | 12,800,922 |
| Rhode Island | 1,058,287 |
| South Carolina | 5,084,156 |
| South Dakota | 878,698 |
| Tennessee | 6,771,631 |
| Texas | 28,628,666 |
| Utah | 3,153,550 |
| Vermont | 624,358 |
| Virginia | 8,501,286 |
| Washington | 7,523,869 |
| West Virginia | 1,804,291 |
| Wisconsin | 5,807,406 |
| Wyoming | 577,601 |