Adair County Flag

Adair County

State:
Missouri
County Seat:
Kirksville

Adair County's estimated 2026 population is 26,518 with a growth rate of 1.64% in the past year according to the most recent United States census data. Adair County is the 41st largest county in Missouri. The 2010 population was 25,638 and has seen a growth of 3.43% since that time.

26,518
Total Population
47
Population Density (mi²)
41
Population Rank (State)
429 1.64%
Annual Population Growth

Adair County Population

Demographics

Economics and Income Statistics