Alexander County Flag

Alexander County

State:
Illinois
County Seat:
Cairo

Alexander County's estimated 2026 population is 4,336 with a growth rate of -2.89% in the past year according to the most recent United States census data. Alexander County is the 99th largest county in Illinois. The 2010 population was 8,205 and has seen a growth of -47.15% since that time.

4,336
Total Population
18
Population Density (mi²)
99
Population Rank (State)
-129 -2.89%
Annual Population Growth

Alexander County Population

Demographics

Economics and Income Statistics