Mount Vernon, Illinois

Mount Vernon, Illinois
Town Center of Mount Vernon
Nickname(s): 
The King City, The Festival City
Motto(s): 
Mount Vernon, City of Opportunity
Location of Mount Vernon in Jefferson County, Illinois.
Mount Vernon
Mount Vernon
Coordinates: 38°19′02″N 88°55′02″W / 38.31722°N 88.91722°W / 38.31722; -88.91722
CountryUnited States
StateIllinois
CountyJefferson
TownshipsMount Vernon, Shiloh, Dodds, McClellan
Founded1817
Government
  MayorJohn Lewis
Area
  Total
14.66 sq mi (37.97 km2)
  Land14.58 sq mi (37.77 km2)
  Water0.08 sq mi (0.21 km2)
Elevation
518 ft (158 m)
Population
 (2020)
  Total
14,600
  Density1,001.17/sq mi (386.56/km2)
Time zoneUTC−6 (CST)
  Summer (DST)UTC−5 (CDT)
ZIP Code(s)
62864
Area codes618
FIPS code17-51180
GNIS feature ID2395129
Public TransitSouth Central Transit
WebsiteOfficial website

Mount Vernon is a city in Jefferson County, Illinois, United States, and its county seat. The population was 14,600 at the 2020 census. Mount Vernon is the principal city of the Mount Vernon, Illinois micropolitan area, which includes all of Jefferson and Hamilton counties.