| State | 2020 Pop. | Average Family Size |
|---|---|---|
| Utah | 3,045,350 | 3.62 |
| Hawaii | 1,422,030 | 3.58 |
| California | 39,148,800 | 3.54 |
| Texas | 27,885,200 | 3.46 |
| Puerto Rico | 3,386,940 | 3.42 |
| Alaska | 738,516 | 3.39 |
| New Mexico | 2,092,430 | 3.34 |
| Nevada | 2,922,850 | 3.33 |
| Georgia | 10,297,500 | 3.31 |
| Arizona | 6,946,680 | 3.31 |
| District of Columbia | 684,498 | 3.3 |
| Louisiana | 4,663,620 | 3.29 |
| New Jersey | 8,881,840 | 3.28 |
| New York | 19,618,500 | 3.27 |
| Florida | 20,598,100 | 3.27 |
| Maryland | 6,003,440 | 3.26 |
| Illinois | 12,821,500 | 3.25 |
| Idaho | 1,687,810 | 3.25 |
| Mississippi | 2,988,760 | 3.24 |
| Virginia | 8,413,770 | 3.17 |
| Oklahoma | 3,918,140 | 3.17 |
| Alabama | 4,864,680 | 3.17 |
| Delaware | 949,495 | 3.15 |
| Connecticut | 3,581,500 | 3.14 |
| Colorado | 5,531,140 | 3.14 |
| South Carolina | 4,955,920 | 3.13 |
| Massachusetts | 6,830,190 | 3.13 |
| Tennessee | 6,651,090 | 3.11 |
| Rhode Island | 1,056,610 | 3.11 |
| Kansas | 2,908,780 | 3.11 |
| Indiana | 6,637,430 | 3.11 |
| Washington | 7,294,340 | 3.1 |
| North Carolina | 10,155,600 | 3.1 |
| Arkansas | 2,990,670 | 3.1 |
| Michigan | 9,957,490 | 3.08 |
| Pennsylvania | 12,791,200 | 3.06 |
| Missouri | 6,090,060 | 3.06 |
| Minnesota | 5,527,360 | 3.06 |
| Oregon | 4,081,940 | 3.05 |
| Nebraska | 1,904,760 | 3.05 |
| Kentucky | 4,440,200 | 3.05 |
| Ohio | 11,641,900 | 3.04 |
| Wyoming | 581,836 | 3.03 |
| South Dakota | 864,289 | 3.03 |
| Montana | 1,041,730 | 3 |
| West Virginia | 1,829,050 | 2.98 |
| Iowa | 3,132,500 | 2.98 |
| Wisconsin | 5,778,390 | 2.97 |
| New Hampshire | 1,343,620 | 2.97 |
| North Dakota | 752,201 | 2.93 |
| Vermont | 624,977 | 2.86 |
| Maine | 1,332,810 | 2.85 |