# Counties in North Dakota by median age on 1 July (US county estimates), 2025

All 53 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `median_age_pep`
- Unit: years
- Definition: Age that divides the resident population of a US county into two halves of equal size on 1 July, from Census Bureau population estimates calculated by single year of age.
- Source: U.S. Census Bureau, Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage (https://www.census.gov/programs-surveys/popest/data/data-sets.html)
- Publisher page: https://invokely.ai/en/publishers/us-census-bureau
- Retrieved: 2026-10-12
- Citation: U.S. Census Bureau. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/median-age-july-1-us-counties/north-dakota-counties

| Rank | Place | years |
|---:|---|---:|
| 1 | Slope County | 54.4 |
| 2 | Grant County | 52.5 |
| 3 | McIntosh County | 51.8 |
| 4 | Nelson County | 51.1 |
| 5 | Emmons County | 50.4 |
| 6 | Sheridan County | 50.2 |
| 7 | Wells County | 49.6 |
| 8 | Adams County | 48.4 |
| 9 | Griggs County | 48.3 |
| 10 | Steele County | 47.5 |
| 11 | McLean County | 47.3 |
| 12 | Sargent County | 46.3 |
| 13 | Oliver County | 46 |
| 14 | Kidder County | 45.9 |
| 14 | Pembina County | 45.9 |
| 16 | Logan County | 45.8 |
| 17 | Cavalier County | 45.7 |
| 17 | LaMoure County | 45.7 |
| 19 | Bottineau County | 45.3 |
| 20 | Pierce County | 45.1 |
| 21 | Bowman County | 45 |
| 21 | Towner County | 45 |
| 23 | Foster County | 44.8 |
| 23 | Golden Valley County | 44.8 |
| 23 | McHenry County | 44.8 |
| 26 | Burke County | 43.9 |
| 26 | Hettinger County | 43.9 |
| 28 | Barnes County | 43.8 |
| 29 | Divide County | 43.6 |
| 29 | Mercer County | 43.6 |
| 31 | Ransom County | 43.5 |
| 32 | Walsh County | 43.2 |
| 33 | Billings County | 43.1 |
| 34 | Renville County | 42.9 |
| 35 | Eddy County | 42.8 |
| 36 | Stutsman County | 40.8 |
| 37 | Ramsey County | 40.7 |
| 37 | Traill County | 40.7 |
| 39 | Dickey County | 39.3 |
| 40 | Burleigh County | 39.1 |
| 41 | Morton County | 39 |
| 42 | Richland County | 38.8 |
| 43 | Dunn County | 37.6 |
| 44 | Mountrail County | 36 |
| 44 | Stark County | 36 |
| 46 | Ward County | 34.2 |
| 47 | Cass County | 33.7 |
| 48 | Williams County | 33.3 |
| 49 | Rolette County | 33 |
| 50 | Benson County | 32.6 |
| 51 | McKenzie County | 32.5 |
| 52 | Grand Forks County | 31.7 |
| 53 | Sioux County | 29.6 |