U.S. child population under 18 by state and county
Residents younger than 18 as a share of all residents.
United States · 2020–2024 · percent · percentage. U.S. Census Bureau, ACS five-year B01001.
- Who is counted
- Total population
- Definition
- Residents younger than 18 as a share of all residents.
- Source publication date
- 2026-01-29
- Uncertainty
- Derived margin of error not calculated; original component MOEs retained
- Website calculation or variable
- 100 × (B01001_003E + B01001_004E + B01001_005E + B01001_006E + B01001_027E + B01001_028E + B01001_029E + B01001_030E) / (B01001_001E)
- Frozen website snapshot
- apd-2026-10-01-r3 · published October 1, 2026; sources acquired September 30, 2026
Source: U.S. Census Bureau · ACS five-year, B01001 · percentage. Derived percentage; margin of error not calculated.
Show accessible data table
| Area | Value (percent) | Numerator | Denominator | 90% MOE |
|---|---|---|---|---|
| United States | 21.9507% | 73,517,834 | 334,922,499 | Not calculated |
| Texas | 24.9919% | 7,544,648 | 30,188,424 | Not calculated |
| California | 21.9735% | 8,632,796 | 39,287,377 | Not calculated |
| New York | 20.4777% | 4,065,312 | 19,852,366 | Not calculated |
| Florida | 19.5165% | 4,374,830 | 22,416,077 | Not calculated |
Child population under 18: definition and scope
Residents younger than 18 as a share of all residents. The headline is the latest value approved within this website’s frozen release. It is not a promise that no newer upstream product exists. The accessible table retains more precision than the rounded headline.
Limitations and comparability
Age groups are summed within the same table; derived uncertainty is not published by this site.
The estimate describes the full 2020–2024 ACS period. Compare it with the same five-year product and universe. One-year ACS, model-based products and administrative counts cannot be joined into an unlabeled series.
Source count margins of error are retained in the raw download, but a margin of error for this calculated percentage is not supplied. We do not infer significance from point estimates, claim statistically settled ranks, or silently convert missing cells to zero. Cross-area associations do not establish individual circumstances or explain what caused a difference.
Source data, calculation and CSV downloads
Use the original selected cells, schema and formula with the immutable release. Summary-file columns use E001/M001; formulas use the corresponding ACS codes ending in E. Percentage numerators and denominators are supplied in the export.
100 × (B01001_003E + B01001_004E + B01001_005E + B01001_006E + B01001_027E + B01001_028E + B01001_029E + B01001_030E) / (B01001_001E)
Original producer file · National source cells · Original table dictionary · All covered areas for this indicator (CSV)
Child population under 18 by state
Same measure, source product and reference period. Alphabetical order; descriptive differences are not significance tests.
| Area | Exact value (percent) | Numerator / denominator | 90% MOE / status |
|---|---|---|---|
| Alabama | 22.2288% | 1,130,725 / 5,086,768 | Derived MOE not calculated · available |
| Alaska | 24.0829% | 177,179 / 735,706 | Derived MOE not calculated · available |
| Arizona | 21.6074% | 1,594,376 / 7,378,838 | Derived MOE not calculated · available |
| Arkansas | 23.1197% | 705,010 / 3,049,391 | Derived MOE not calculated · available |
| California | 21.9735% | 8,632,796 / 39,287,377 | Derived MOE not calculated · available |
| Colorado | 21.0080% | 1,231,527 / 5,862,189 | Derived MOE not calculated · available |
| Connecticut | 20.1844% | 731,586 / 3,624,508 | Derived MOE not calculated · available |
| Delaware | 20.7280% | 211,672 / 1,021,191 | Derived MOE not calculated · available |
| District of Columbia | 18.6871% | 127,314 / 681,294 | Derived MOE not calculated · available |
| Florida | 19.5165% | 4,374,830 / 22,416,077 | Derived MOE not calculated · available |
| Georgia | 23.2304% | 2,541,498 / 10,940,407 | Derived MOE not calculated · available |
| Hawaii | 20.6616% | 298,609 / 1,445,235 | Derived MOE not calculated · available |
| Idaho | 24.1013% | 466,183 / 1,934,262 | Derived MOE not calculated · available |
| Illinois | 21.8463% | 2,773,339 / 12,694,798 | Derived MOE not calculated · available |
| Indiana | 23.2726% | 1,594,421 / 6,851,073 | Derived MOE not calculated · available |
| Iowa | 22.8940% | 735,015 / 3,210,507 | Derived MOE not calculated · available |
| Kansas | 23.7592% | 700,229 / 2,947,197 | Derived MOE not calculated · available |
| Kentucky | 22.6023% | 1,024,976 / 4,534,824 | Derived MOE not calculated · available |
| Louisiana | 23.4792% | 1,082,850 / 4,611,961 | Derived MOE not calculated · available |
| Maine | 18.0528% | 250,540 / 1,387,817 | Derived MOE not calculated · available |
| Maryland | 22.1801% | 1,376,500 / 6,206,011 | Derived MOE not calculated · available |
| Massachusetts | 19.3664% | 1,364,181 / 7,044,056 | Derived MOE not calculated · available |
| Michigan | 21.2397% | 2,140,484 / 10,077,761 | Derived MOE not calculated · available |
| Minnesota | 22.8627% | 1,312,190 / 5,739,445 | Derived MOE not calculated · available |
| Mississippi | 23.3070% | 686,805 / 2,946,779 | Derived MOE not calculated · available |
| Missouri | 22.3308% | 1,382,679 / 6,191,814 | Derived MOE not calculated · available |
| Montana | 21.0146% | 234,707 / 1,116,875 | Derived MOE not calculated · available |
| Nebraska | 24.4983% | 484,749 / 1,978,707 | Derived MOE not calculated · available |
| Nevada | 21.7439% | 692,459 / 3,184,612 | Derived MOE not calculated · available |
| New Hampshire | 18.2440% | 254,480 / 1,394,868 | Derived MOE not calculated · available |
| New Jersey | 21.8074% | 2,037,645 / 9,343,809 | Derived MOE not calculated · available |
| New Mexico | 21.7494% | 461,141 / 2,120,246 | Derived MOE not calculated · available |
| New York | 20.4777% | 4,065,312 / 19,852,366 | Derived MOE not calculated · available |
| North Carolina | 21.7599% | 2,334,920 / 10,730,404 | Derived MOE not calculated · available |
| North Dakota | 23.5030% | 184,461 / 784,841 | Derived MOE not calculated · available |
| Ohio | 22.0160% | 2,600,150 / 11,810,293 | Derived MOE not calculated · available |
| Oklahoma | 23.9506% | 964,881 / 4,028,634 | Derived MOE not calculated · available |
| Oregon | 19.9098% | 847,022 / 4,254,293 | Derived MOE not calculated · available |
| Pennsylvania | 20.4425% | 2,661,340 / 13,018,639 | Derived MOE not calculated · available |
| Rhode Island | 18.8260% | 207,425 / 1,101,801 | Derived MOE not calculated · available |
| South Carolina | 21.4383% | 1,135,421 / 5,296,225 | Derived MOE not calculated · available |
| South Dakota | 24.2160% | 219,743 / 907,428 | Derived MOE not calculated · available |
| Tennessee | 22.1750% | 1,566,969 / 7,066,383 | Derived MOE not calculated · available |
| Texas | 24.9919% | 7,544,648 / 30,188,424 | Derived MOE not calculated · available |
| Utah | 27.7977% | 942,989 / 3,392,331 | Derived MOE not calculated · available |
| Vermont | 17.9238% | 115,986 / 647,106 | Derived MOE not calculated · available |
| Virginia | 21.7208% | 1,890,833 / 8,705,170 | Derived MOE not calculated · available |
| Washington | 21.3818% | 1,671,227 / 7,816,116 | Derived MOE not calculated · available |
| West Virginia | 20.0182% | 355,999 / 1,778,373 | Derived MOE not calculated · available |
| Wisconsin | 21.3791% | 1,264,546 / 5,914,872 | Derived MOE not calculated · available |
| Wyoming | 22.5391% | 131,267 / 582,397 | Derived MOE not calculated · available |