Mount Vernon Flag

Mount Vernon

County Seat:
Yes
Area (mi²):
14.649
State:
Illinois

Mount Vernon is a city located in Jefferson County, Illinois. Mount Vernon has a 2025 population of 14,060 . It is also the county seat of Jefferson County . Mount Vernon is currently declining at a rate of -0.72% annually and its population has decreased by -3.5% since the most recent census, which recorded a population of 14,570 in 2020.

The average household income in Mount Vernon is $67,340 with a poverty rate of 18.72%. The median age in Mount Vernon is 39 years: 34.8 years for males, and 43.5 years for females. For every 100 females there are 101.7 males.

14.1K
Total Population
960
Density (mi²)
-102 -0.72%
Growth

Mount Vernon 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)