Petersburg Flag

Petersburg

County:
Menard County
County Seat:
Yes
Area (mi²):
1.562
State:
Illinois

Petersburg is a city located in Menard County, Illinois. Petersburg has a 2026 population of 2,156. It is also the county seat of Menard County. Petersburg is currently declining at a rate of -0.28% annually and its population has decreased by -2.84% since the most recent census, which recorded a population of 2,219 in 2020.

2.2K
Total Population
1,380
Density (mi²)
-6 -0.28%
Growth

Nearby Cities

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)