From its county population in 2000 of 14691 to its current population estimate of 18417, the county has experienced a growth change of 3726.
In 1920 Brantley County, in southeast Georgia, became Georgia's 158th county.
The county was named for either Benjamin Daniel Brantley (1832-91), a merchant who encouraged the development of cotton ginning and turpentine manufacturing in the area, or his son, William Gordon Brantley (1860-1934), who served in both houses of the Georgia legislature and in the U.S. House of Representatives.
Soon after the county was created, controversy arose over the choice of the county seat. After three years of court battles and an election, the Georgia General Assembly designated Nahunta, in the east, as the new county seat.
Fort Mudge was built in the county at about the same time. This fort was immortalized by Walt Kelly in the "Pogo" comic strip.
Nahunta sounds as if it has an Indian name, but in fact the name is a colloquialism derived from railroad maps and a sign, "N.A. Hunter Siding."