The courthouse was built in 1871 after Effingham was named the county seat. The courthouse retains a pristine exterior and is listed on the National Register of Historic Places. It also features a museum inside. The museum displays two rooms devoted to the military, which gets changed throughout the year. It also has a room dedicated to the railroads in Effingham County. The Effingham County Courthouse is open Tuesdays and Saturdays from 10 a.m. to 2 p.m. March through October. The Courthouse Museum hosts several events throughout the year, including the annual Old Settler's Reunion.