List of U.S. State Census (1870)
| State Name | Code | Year | Population |
|---|---|---|---|
| Alabama | AL | 1870 | 996992 |
| Arizona | AZ | 1870 | 9658 |
| Arkansas | AR | 1870 | 484471 |
| California | CA | 1870 | 560247 |
| Colorado | CO | 1870 | 39864 |
| Connecticut | CT | 1870 | 537454 |
| Delaware | DE | 1870 | 125015 |
| Florida | FL | 1870 | 187748 |
| Georgia | GA | 1870 | 1184109 |
| Idaho | ID | 1870 | 14999 |
| Illinois | IL | 1870 | 2539891 |
| Indiana | IN | 1870 | 1680637 |
| Iowa | IA | 1870 | 1194020 |
| Kansas | KS | 1870 | 364399 |
| Kentucky | KY | 1870 | 1321011 |
| Louisiana | LA | 1870 | 726915 |
| Maine | ME | 1870 | 626915 |
| Maryland | MD | 1870 | 780894 |
| Massachusetts | MA | 1870 | 1457351 |
| Michigan | MI | 1870 | 1184059 |
| Minnesota | MN | 1870 | 439706 |
| Mississippi | MS | 1870 | 827922 |
| Missouri | MO | 1870 | 1721295 |
| Montana | MT | 1870 | 20595 |
| Nebraska | NE | 1870 | 122993 |
| Nevada | NV | 1870 | 42491 |
| New Hampshire | NH | 1870 | 318300 |
| New Jersey | NJ | 1870 | 906096 |
| New Mexico | NM | 1870 | 91874 |
| New York | NY | 1870 | 4382759 |
| North Carolina | NC | 1870 | 1071361 |
| North Dakota | ND | 1870 | 2405 |
| Ohio | OH | 1870 | 2665260 |
| Oregon | OR | 1870 | 90923 |
| Pennsylvania | PA | 1870 | 3521951 |
| Rhode Island | RI | 1870 | 217353 |
| South Carolina | SC | 1870 | 705606 |
| South Dakota | SD | 1870 | 11776 |
| Tennessee | TN | 1870 | 1258520 |
| Texas | TX | 1870 | 818579 |
| Utah | UT | 1870 | 86336 |
| Vermont | VT | 1870 | 330551 |
| Virginia | VA | 1870 | 1225163 |
| Washington | WA | 1870 | 23955 |
| Washington D.C. | DC | 1870 | 131700 |
| West Virginia | WV | 1870 | 442014 |
| Wisconsin | WI | 1870 | 1054670 |
| Wyoming | WY | 1870 | 9118 |