Twin City gets its name from the combining of two adjacent towns, Graymont and Summit.

[4] Of Twin City's 3.6 square miles (9.3 km2) area, 255 acres (1.03 km2) is included in the Twin City Historic District, listed on the National Register of Historic Places.

[7] As of the 2020 United States census, there were 1,642 people, 559 households, and 333 families residing in the city.

[22] Anglers and canoeists can explore the mill pond dotted with Spanish moss-draped trees and home to blue heron and white ibis.

[citation needed] Hikers can walk seven miles of trails while searching for gopher tortoises, Georgia's state reptile.