The Old Meigs County Courthouse is a historic former government building in the small community of Chester, Ohio, United States. Erected in the early nineteenth century, the courthouse served multiple purposes for the surrounding community in its early years, but it operated as a courthouse for less than twenty years before being abandoned in favor of another courthouse in another community. Following a restoration in the 1950s, it was designated a historic site in the 1970s along with an adjacent school; the two buildings are operated together as a museum. It is Ohio's oldest extant building constructed as a courthouse.