The resident population of U.S is 315,993,715 as of July 1, 2013.
| Resident | 315,993,715 |
| Resident Plus Armed Forces Overseas | 316,294,766 |
| Civilian | 314,751,147 |
| Noninstitutionalized Civilian | 310,800,339 |
| Household | 307,927,587 |
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 (38,260,787), and the least is Wyoming (582,122) as of July 1, 2013. The below table shows all states population in 2013 [1].
| State | Population |
| Alabama | 4,830,081 |
| Alaska | 737,068 |
| Arizona | 6,632,764 |
| Arkansas | 2,959,400 |
| California | 38,260,787 |
| Colorado | 5,269,035 |
| Connecticut | 3,594,841 |
| Delaware | 923,576 |
| District of Columbia | 650,581 |
| Florida | 19,545,621 |
| Georgia | 9,972,479 |
| Hawaii | 1,408,243 |
| Idaho | 1,611,206 |
| Illinois | 12,895,129 |
| Indiana | 6,568,713 |
| Iowa | 3,092,997 |
| Kansas | 2,893,212 |
| Kentucky | 4,404,659 |
| Louisiana | 4,624,527 |
| Maine | 1,328,009 |
| Maryland | 5,923,188 |
| Massachusetts | 6,713,315 |
| Michigan | 9,913,065 |
| Minnesota | 5,413,479 |
| Mississippi | 2,988,711 |
| Missouri | 6,040,715 |
| Montana | 1,013,569 |
| Nebraska | 1,865,279 |
| Nevada | 2,775,970 |
| New Hampshire | 1,326,622 |
| New Jersey | 8,856,972 |
| New Mexico | 2,092,273 |
| New York | 19,624,447 |
| North Carolina | 9,843,336 |
| North Dakota | 722,036 |
| Ohio | 11,576,684 |
| Oklahoma | 3,853,214 |
| Oregon | 3,922,468 |
| Pennsylvania | 12,776,309 |
| Rhode Island | 1,055,081 |
| South Carolina | 4,764,080 |
| South Dakota | 842,316 |
| Tennessee | 6,494,340 |
| Texas | 26,480,266 |
| Utah | 2,897,640 |
| Vermont | 626,210 |
| Virginia | 8,252,427 |
| Washington | 6,963,985 |
| West Virginia | 1,853,914 |
| Wisconsin | 5,736,754 |
| Wyoming | 582,122 |