In some states there are more kids, such as Utah, which has the youngest median age at 31 years and 4 months. In others states there are more older adults, such as Maine, which has the oldest median age at 44 and 8 months. This is based on the 2021 American Community Survey.
Of course, we can see the age breakdowns in greater detail. States aren’t uniformly young and old.
Source: Data