List of U.S. State Census (1940)
| State Name | Code | Year | Population |
|---|---|---|---|
| Alabama | AL | 1940 | 2832961 |
| Alaska | AK | 1940 | 72524 |
| Arizona | AZ | 1940 | 499261 |
| Arkansas | AR | 1940 | 1949387 |
| California | CA | 1940 | 6907387 |
| Colorado | CO | 1940 | 1123296 |
| Connecticut | CT | 1940 | 1709242 |
| Delaware | DE | 1940 | 266505 |
| Florida | FL | 1940 | 1897414 |
| Georgia | GA | 1940 | 3123723 |
| Hawaii | HI | 1940 | 423330 |
| Idaho | ID | 1940 | 524873 |
| Illinois | IL | 1940 | 7897241 |
| Indiana | IN | 1940 | 3427796 |
| Iowa | IA | 1940 | 2538268 |
| Kansas | KS | 1940 | 1801028 |
| Kentucky | KY | 1940 | 2845627 |
| Louisiana | LA | 1940 | 2363880 |
| Maine | ME | 1940 | 847226 |
| Maryland | MD | 1940 | 1821244 |
| Massachusetts | MA | 1940 | 4316721 |
| Michigan | MI | 1940 | 5256106 |
| Minnesota | MN | 1940 | 2792300 |
| Mississippi | MS | 1940 | 2183796 |
| Missouri | MO | 1940 | 3784664 |
| Montana | MT | 1940 | 559456 |
| Nebraska | NE | 1940 | 1315834 |
| Nevada | NV | 1940 | 110247 |
| New Hampshire | NH | 1940 | 491524 |
| New Jersey | NJ | 1940 | 4160165 |
| New Mexico | NM | 1940 | 531818 |
| New York | NY | 1940 | 13479142 |
| North Carolina | NC | 1940 | 3571623 |
| North Dakota | ND | 1940 | 641935 |
| Ohio | OH | 1940 | 6907612 |
| Oklahoma | OK | 1940 | 2336434 |
| Oregon | OR | 1940 | 1089684 |
| Pennsylvania | PA | 1940 | 9900180 |
| Rhode Island | RI | 1940 | 713346 |
| South Carolina | SC | 1940 | 1899804 |
| South Dakota | SD | 1940 | 642961 |
| Tennessee | TN | 1940 | 2915841 |
| Texas | TX | 1940 | 6414824 |
| Utah | UT | 1940 | 550310 |
| Vermont | VT | 1940 | 359231 |
| Virginia | VA | 1940 | 2677773 |
| Washington | WA | 1940 | 1736191 |
| Washington D.C. | DC | 1940 | 663091 |
| West Virginia | WV | 1940 | 1901974 |
| Wisconsin | WI | 1940 | 3137587 |
| Wyoming | WY | 1940 | 250742 |