Mercer County, Illinois, United States

Overview of Mercer County

• Name:
  Mercer County
• Place Type:
  County
• Located In:
  Illinois, United States
  
• History (GNIS):
  Established 13 January 1825
• County Seat:
  Aledo (Mercer Township)
• Coordinates:
  Latitude:41.200034641° 12' 00.1"N

  Longitude:-90.750695290° 45' 02.5"W
• Population:
  17,290
• Elevation:
  226 m
• Surrounding Counties:
  • Rock Island NE
  • Henry E
  • Knox SE
  • Warren S
  • Henderson S
  • Des Moines (Iowa) SW
  • Louisa (Iowa) W
  • Muscatine (Iowa) NW
• Histopolis Place ID:
  323555571
• Updated May 6, 2020