Boone County Flag

Boone County

State:
Illinois
County Seat:
Belvidere

Boone County's estimated 2025 population is 53,387 with a growth rate of 0.14% in the past year according to the most recent United States census data. Boone County is the 27th largest county in Illinois. The 2010 population was 54,094 and has seen a growth of -1.31% since that time.

53,387
Total Population
190
Population Density (mi²)
27
Population Rank (State)
74 0.14%
Annual Population Growth

Boone 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)