Rock Island County Map
The County of Rock Island is located in the State of Illinois. Find directions to Rock Island County, browse local businesses, landmarks, get current traffic estimates, road conditions, and more. According to the 2020 US Census the Rock Island County population is estimated at 140,907 people. The Rock Island County time zone is Central Daylight Time which is 6 hours behind Coordinated Universal Time (UTC).
Nearby counties include Henry County, Mercer County, Whiteside County, Clinton County, Louisa County, Muscatine County, Scott County.
Top cities include Moline, Rock Island, East Moline, Silvis, Milan