Located in the extreme west of Illinois along the Mississippi River, Adams County was formed in 1825 and named for President John Quincy Adams. The county seat and largest city is Quincy, Illinois, which has a rich 19th-century heritage as a river-boat and rail transportation hub. The region’s geography is largely agricultural land, with a mix of urban (centred in the city of Quincy) and extensive rural farmland. Towns and villages include Quincy, Camp Point, Clayton, Columbus, Liberty, Mendon, Payson, Ursa and others. Housing in Adams County tends to be single-family homes, modest in size in and around Quincy, with larger acreages available in the more rural stretches. As of late 2025, the median sale price was about $185,000. Older homes in Quincy may be valued in the $120,000-$250,000 range; in the rural parts you can still find homes or lots for considerably less, and building new might cost in the several hundreds of thousands depending on acreage and amenities. With large agricultural parcels, some buyers choose to build custom homes. Most of the county is reasonably accessible from Quincy, making it a blend of urban convenience and rural space.
Adams County Real Estate Listings
Located in the extreme west of Illinois along the Mississippi River, Adams County was formed in 1825 and named for President John Quincy Adams. The county seat and largest city is Quincy, Illinois, which has a rich 19th-century heritage as a river-boat and rail transportation hub. The region’s geography is largely agricultural land, with a mix of urban (centred in the city of Quincy) and extensive rural farmland. Towns and villages include Quincy, Camp Point, Clayton, Columbus, Liberty, Mendon, Payson, Ursa and others. Housing in Adams County tends to be single-family homes, modest in size in and around Quincy, with larger acreages available in the more rural stretches. As of late 2025, the median sale price was about $185,000. Older homes in Quincy may be valued in the $120,000-$250,000 range; in the rural parts you can still find homes or lots for considerably less, and building new might cost in the several hundreds of thousands depending on acreage and amenities. With large agricultural parcels, some buyers choose to build custom homes. Most of the county is reasonably accessible from Quincy, making it a blend of urban convenience and rural space.