The resident population of U.S is 313,830,990 as of July 1, 2012.
| Resident | 313,830,990 |
| Resident Plus Armed Forces Overseas | 314,167,558 |
| Civilian | 312,590,831 |
| Noninstitutionalized Civilian | 308,610,189 |
| Household | 305,747,814 |
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 (37,948,800), and the least is Wyoming (576,305) as of July 1, 2012. The below table shows all states population in 2012 [1].
| State | Population |
| Alabama | 4,815,588 |
| Alaska | 730,443 |
| Arizona | 6,554,978 |
| Arkansas | 2,952,164 |
| California | 37,948,800 |
| Colorado | 5,192,647 |
| Connecticut | 3,594,547 |
| Delaware | 915,179 |
| District of Columbia | 634,924 |
| Florida | 19,297,822 |
| Georgia | 9,901,430 |
| Hawaii | 1,394,804 |
| Idaho | 1,595,324 |
| Illinois | 12,882,510 |
| Indiana | 6,537,703 |
| Iowa | 3,076,190 |
| Kansas | 2,885,257 |
| Kentucky | 4,386,346 |
| Louisiana | 4,600,972 |
| Maine | 1,327,729 |
| Maryland | 5,886,992 |
| Massachusetts | 6,663,005 |
| Michigan | 9,897,145 |
| Minnesota | 5,376,643 |
| Mississippi | 2,983,816 |
| Missouri | 6,024,367 |
| Montana | 1,003,783 |
| Nebraska | 1,853,303 |
| Nevada | 2,743,996 |
| New Hampshire | 1,324,232 |
| New Jersey | 8,844,942 |
| New Mexico | 2,087,309 |
| New York | 19,572,932 |
| North Carolina | 9,749,476 |
| North Dakota | 701,176 |
| Ohio | 11,548,923 |
| Oklahoma | 3,818,814 |
| Oregon | 3,899,001 |
| Pennsylvania | 12,767,118 |
| Rhode Island | 1,054,621 |
| South Carolina | 4,717,354 |
| South Dakota | 833,566 |
| Tennessee | 6,453,898 |
| Texas | 26,084,481 |
| Utah | 2,853,375 |
| Vermont | 626,090 |
| Virginia | 8,185,080 |
| Washington | 6,897,058 |
| West Virginia | 1,856,872 |
| Wisconsin | 5,719,960 |
| Wyoming | 576,305 |