Lake Milton is a census-designated place in central Milton Township, Mahoning County, Ohio, United States. It has a post office with the ZIP code 44429. It sits on the edge of the Lake Milton reservoir in northwestern Mahoning County, and is part of the greater Mahoning Valley.
A post office called Lake Milton has been in operation since 1942. The community takes its name from nearby Lake Milton, a reservoir impounded by a dam constructed in 1913, following that year's flood of the Mahoning River.
