Mason Flag

Mason

County Seat:
No
Area (mi²):
1.287
State:
Illinois

Mason is a town located in Effingham County, Illinois. Mason has a 2026 population of 321. Mason is currently growing at a rate of 0.31% annually but its population has decreased by -1.23% since the most recent census, which recorded a population of 325 in 2020.

321
Total Population
249
Density (mi²)
1 0.31%
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)