Rock Island County, Illinois, United States

Overview of Rock Island County

• Name:
  Rock Island County
• Place Type:
  County
• Located In:
  Illinois, United States
  
• History (GNIS):
  Established 9 February 1831
• County Seat:
  Rock Island
• Coordinates:
  Latitude:41.450034041° 27' 00.1"N

  Longitude:-90.516800690° 31' 00.5"W
• Population:
  148,723
• Elevation:
  179 m
• Surrounding Counties:
  • Whiteside NE
  • Henry E
  • Mercer SW
  • Louisa (Iowa) W
  • Muscatine (Iowa) W
  • Scott (Iowa) NW
  • Clinton (Iowa) N
• Histopolis Place ID:
  822829902
• Updated May 6, 2020