Macoupin County Flag

Macoupin County

State:
Illinois
County Seat:
Carlinville

Macoupin County's estimated 2026 population is 43,431 with a growth rate of -0.53% in the past year according to the most recent United States census data. Macoupin County is the 32nd largest county in Illinois. The 2010 population was 47,798 and has seen a growth of -9.14% since that time.

43,431
Total Population
50
Population Density (mi²)
32
Population Rank (State)
-232 -0.53%
Annual Population Growth

Macoupin County Population

Demographics

Economics and Income Statistics