List of U.S. states and territories by median age
This is a list of U.S. states, the District of Columbia and territories by median age in 2018. Median age is the age that divides a population into two numerically equal groups - that is, half the people are younger than this age and half are older. It is a single index that summarizes the age distribution of a population.
| Rank | State, federal district, or territory | Median age in years |
| 1 | 44.9 | |
| 2 | 43.0 | |
| 3 | 42.8 | |
| 4 | 42.7 | |
| 5 | 42.2 | |
| 6 | 41.5 | |
| 7 | 41.0 | |
| 8 | 41.0 | |
| 9 | 40.8 | |
| 10 | 40.7 | |
| 11 | 40.1 | |
| 12 | 40.0 | |
| 13 | 39.9 | |
| 14 | 39.8 | |
| 15 | 39.6 | |
| 15 | 39.6 | |
| 17 | 39.4 | |
| 17 | 39.4 | |
| 17 | 39.4 | |
| 20 | 39.2 | |
| 20 | 39.2 | |
| 22 | 39.0 | |
| 23 | 38.9 | |
| 23 | 38.9 | |
| 25 | 38.8 | |
| 25 | 38.8 | |
| 27 | 38.7 | |
| 28 | 38.4 | |
| 29 | 38.3 | |
| 29 | 38.3 | |
| 31 | 38.2 | |
| — | 38.2 | |
| 32 | 38.1 | |
| 32 | 38.1 | |
| 32 | 38.1 | |
| 35 | 38.0 | |
| 36 | 37.9 | |
| 36 | 37.9 | |
| 38 | 37.7 | |
| 38 | 37.7 | |
| 40 | 37.2 | |
| 41 | 37.1 | |
| 42 | 36.9 | |
| 42 | Georgia | 36.9 |
| 42 | 36.9 | |
| 45 | 36.8 | |
| 46 | 36.7 | |
| 47 | 36.6 | |
| 47 | 36.6 | |
| 49 | 35.2 | |
| 50 | 34.8 | |
| 51 | 34.6 | |
| 52 | 34.0 | |
| 53 | 33.6 | |
| 54 | 31.0 | |
| 55 | 29.0 | |
| 56 | 25.5 |