Allen County Flag

Allen County

State:
Kansas
County Seat:
Iola

Allen County's estimated 2025 population is 12,384 with a growth rate of -0.33% in the past year according to the most recent United States census data. Allen County is the 36th largest county in Kansas. The 2010 population was 13,363 and has seen a growth of -7.33% since that time.

12,384
Total Population
25
Population Density (mi²)
36
Population Rank (State)
-41 -0.33%
Annual Population Growth

Allen County Population

Demographics

Economics and Income Statistics

Sources

  1. City and Town Population Totals: 2020-2024
  2. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  3. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  4. American Community Survey (2009 - 2013)
  5. Census QuickFacts
  6. Historical Populations of States and Counties (1790 - 1990)