State Route 4 (SR 4) is a state highway in the eastern part of the U.S. state of Georgia. Except for its northernmost portion, it is completely concurrent for its entire length with U.S. Route 1 (US 1). It traverses south-to-north through portions of Charlton, Ware, Bacon, Appling, Toombs, Emanuel, Jefferson, and Richmond counties in the southeastern and east-central parts of the state. The highway begins at the Florida state line, on US 1/US 23/US 301/SR 15 at the St. Marys River. It travels to its northern terminus at the South Carolina state line, on the Augusta–North Augusta, South Carolina city line, on US 25 Business at the Savannah River.

Richmond County is located in the state of Georgia in the U.S. As of the 2020 census, the population was 206,607. It is one of the original counties of Georgia, created on February 5, 1777. Following an election in 1995, Augusta consolidated governments with Richmond County. The consolidated entity is known as Augusta-Richmond County, or simply Augusta. Exempt are the cities of Hephzibah and Blythe, in southern Richmond County, which voted to remain separate. Richmond County is included in the Augusta-Richmond County, GA-SC metropolitan statistical area.