Stony Prairie is a census-designated place (CDP) in Sandusky County, Ohio, United States.

"Stony Prairie" originally referred to a region in the area.

[4] According to the United States Census Bureau, the CDP has a total area of 1.5 square miles (3.9 km2), all land.

There were 367 housing units at an average density of 238.1 per square mile (91.9/km2).

28.7% of all households were made up of individuals, and 16.6% had someone living alone who was 65 years of age or older.