South Union is an unincorporated community located in Logan County, Kentucky, United States.

[2] During this period, the Shakers constructed 200 buildings, worked 6,000 acres (2,400 ha) of farmland, and produced garden seed, fruit preserves, brooms, baskets, rugs, linen, hats, bonnets and silk both for use within the community and sales to the outside world.

After the Civil War, they hired about a dozen freedmen to work in their woolen and flour mills, allowing them to build cabins here.

Today, in addition to the Shaker Museum historical site, the South Union community is host to the county's only waste transfer station, operated by Apex and Scott Waste Services.

South Union is located roughly halfway between Russellville and Bowling Green.