Adair County Flag

Adair County

State:
Missouri
County Seat:
Kirksville

Adair County's estimated 2026 population is 25,751 with a growth rate of 0.26% in the past year according to the most recent United States census data. Adair County is the 43rd largest county in Missouri. The 2010 population was 25,638 and has seen a growth of 0.44% since that time.

25,751
Total Population
45
Population Density (mi²)
43
Population Rank (State)
67 0.26%
Annual Population Growth

Adair County Population

Demographics

Economics and Income Statistics