Mercer Flag

Mercer

County:
Mercer County
County Seat:
No
Area (mi²):
35.424
State:
Illinois

Mercer is located in Mercer County, Illinois. Mercer has a 2025 population of 3,870. Mercer is currently declining at a rate of -0.44% annually and its population has decreased by -2.17% since the most recent census, which recorded a population of 3,956 in 2020.

The average household income in Mercer is $79,472 with a poverty rate of 10.19%.The median age in Mercer is 42.3 years: 39 years for males, and 42.7 years for females.

3.9K
Total Population
109
Density (mi²)
-17 -0.44%
Growth

Mercer Population

Demographics

Economics and Income Statistics

Sources

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