Dupo Flag

Dupo

County Seat:
No
Area (mi²):
6.403
State:
Illinois

Dupo is a village located in St. Clair County, Illinois. Dupo has a 2025 population of 3,717. Dupo is currently declining at a rate of -1.38% annually and its population has decreased by -6.51% since the most recent census, which recorded a population of 3,976 in 2020.

The average household income in Dupo is $76,366 with a poverty rate of 9.91%.The median age in Dupo is 43.1 years: 39.3 years for males, and 43.7 years for females.

3.7K
Total Population
581
Density (mi²)
-52 -1.38%
Growth

Dupo 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)