| South Williamson, Kentucky | |
| Settlement Type: | Census-designated place (CDP) |
| Mapsize: | 260px |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Kentucky |
| Subdivision Type2: | County |
| Subdivision Name2: | Pike |
| Population As Of: | 2020 |
| Population Total: | 562 |
| Postal Code Type: | Zip codes |
| Postal Code: | 41503, 41514 & 41527 |
| Area Code: | 606 |
| Blank Name: | FIPS code |
| Blank Info: | 21-72264 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2629682 |
| Elevation Ft: | 705 |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 5.11 |
| Area Total Sq Mi: | 1.97 |
| Area Land Km2: | 5.11 |
| Area Water Km2: | 0.00 |
| Area Land Sq Mi: | 1.97 |
| Area Water Sq Mi: | 0.00 |
| Population Density Sq Mi: | 284.70 |
| Population Density Km2: | 109.92 |
South Williamson is a census-designated place (CDP) in the Appalachian Mountains of northeastern Pike County, Kentucky, United States, on the border with West Virginia. It is separated from Williamson, West Virginia by the Tug Fork River. The community is located near U.S. Route 119 about east of Pikeville, Kentucky and southwest of Logan, West Virginia.
The South Williamson area includes the surrounding Kentucky communities of Goody, Forest Hills, Toler, and Belfry. In 1990s, residents of the area voted down a proposal to incorporate the area. Another incorporation attempt was proposed in 2015 and the name Johnsonville was proposed for the new incorporated town.[2]
The local economy is largely fueled by coal mining, transportation, health care, and retail.
Southside Mall is located in South Williamson.
In the late 19th century, Pike County and bordering Mingo County, West Virginia provided the setting for the Hatfield-McCoy feud, a bitter feud waged between two feuding families between 1878 and 1891 that has become American history.
South Williamson is protected by a floodwall, built by the US Army Corps of Engineers in response to a devastating flood along the Tug Fork River in 1977. There have only been two uses of the gates thus far; the first occurred in 2002 during a major flood in the region, and the second in 2003, due to anticipation of the rising river getting higher.
South Williamson is the location of Appalachian Regional Healthcare's Tug Valley Regional Medical Center.