Mason City Flag

Mason City

County:
Mason County
County Seat:
No
Area (mi²):
1.013
State:
Illinois

Mason City is a city located in Mason County, Illinois. Mason City has a 2026 population of 1,982. Mason City is currently declining at a rate of -0.45% annually and its population has decreased by -4.16% since the most recent census, which recorded a population of 2,068 in 2020.

2K
Total Population
1,957
Density (mi²)
-9 -0.45%
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)