Poston is an unincorporated community in Florence County, South Carolina, United States.

[4] Poston was originally known as Ellison and functioned as a river port on the Great Pee Dee.

[5] The name of the hamlet evolved over time as members of the Poston family, headed by brothers John and Andrew who moved to the region from Buncombe County, North Carolina, began to proliferate the area (formerly part of Marion County).

[5] In 1914, the locale gained a railroad junction which spurred great economic growth through the creation of new businesses and jobs.

However, locals took issue with the idea of a planned repair store in the area.