Mercer County, established in 1825 and named for Revolutionary War hero Hugh Mercer, is located in northwestern Illinois along the Mississippi River. The county seat is Aledo, a welcoming town famous for its annual Rhubarb Festival and its strong sense of community. Other villages include Joy, Keithsburg, and New Boston. The area is primarily agricultural, but its riverfront and rolling terrain give it scenic appeal. The housing market is very affordable: existing homes range $130,000–$200,000, while larger country homes or riverfront properties can reach $250K–$300K. New construction (including land) costs $240K–$350K, depending on lot and utilities. The lifestyle is peaceful and rural, with a friendly Midwestern culture and easy access to the Quad Cities region about 35 minutes away. Residents enjoy small-town safety, open skies, and affordable living with river views — a quintessential small-county experience.