Jefferson County, Illinois, United States

Overview of Jefferson County

• Name:
  Jefferson County
• Place Type:
  County
• Located In:
  Illinois, United States
  
• County Seat:
  Mount Vernon (Mount Vernon Township)
• Coordinates:
  Latitude:38.300049538° 18' 00.2"N

  Longitude:-88.933399288° 56' 00.2"W
• Population:
  37,020
• Elevation:
  159 m
• Surrounding Counties:
  • Marion N
  • Wayne E
  • Hamilton SE
  • Franklin S
  • Perry SW
  • Washington W
  • Clinton NW
• Histopolis Place ID:
  879159155
• Updated Oct 8, 2012