Effingham County is a county in the US state of Georgia. In the 2000 census the county had a population of 37,535 inhabitants. It is part of the Savannah metropolitan area. The county seat is Springfield, the county is one of the eight original counties of Georgia, being founded on February 5,1777. It was named in honor of Thomas Howard, 3rd Earl of Effingham, an Englishman who supported colonial rights.