Hannahs Mill is an unincorporated community and census-designated place (CDP) in Upson County, Georgia, United States.

Hannahs Mill is located at 32°56′08″N 84°20′17″W / 32.935572°N 84.338136°W / 32.935572; -84.338136.

[5] According to the United States Census Bureau, the CDP has a total area of 4.4 square miles (11 km2), of which 4.4 square miles (11 km2) is land and 0.23% is water.

Hannahs Mills first appeared as a census designated place in the 1980 U.S.

[15] It was not listed in the 1990 U.S. census[16] after a portion of the CDP was annexed to Thomaston.