Flintside is an unincorporated community in Sumter County, in the U.S. state of Georgia.
A post office called Flintside was established in 1924, and remained in operation until 1935. The community was named from its location on the Flint River. A variant name was "Huguenin".
31°57′18″N 83°57′16″W / 31.95500°N 83.95444°W