Stonefort is a village in Saline and Williamson counties, Illinois, United States. The population was 297 at the 2010 census. Stonefort school system merged with Carrier Mills, and is platted on the face of a bluff or Stonefort Bluff.
Stonefort is located at 37°37′0″N 88°42′26″W / 37.616667°N 88.70722°W / 37.616667; -88.70722 (37.616615, -88.707143).
According to the United States Census Bureau, the village has a total area of 1.5 square miles (3.8 km²), all of it land.