Adams County is the westernmost county in the U.S. state of Illinois. As of the 2020 United States census, the population was 65,737. Its county seat is Quincy. Adams County is part of the Quincy, IL–
Quincy is a city in Adams County, Illinois, United States, and its county seat. Located on the Mississippi River, the population was 39,463 as of the 2020 census, down from 40,633 in 2010. The Quincy
Adams County, Illinois
…Adams County is the westernmost county in the U.S. state of Illinois. As of the 2020 United States census, the population was 65,737. Its county seat is Quincy. Adams County is part of the Quincy, IL–MO Micropolitan Statistical Area. Adams County was formed in 1825 out of Pike County. Its name is in honor of…