Northridge is a census-designated place (CDP) in Clark County, Ohio, United States.

Northridge is located in north-central Clark County in the western part of Moorefield Township.

Ohio State Route 72 (Urbana Road) forms part of the western edge of the CDP.

According to the United States Census Bureau, the CDP has a total area of 3.1 square miles (7.9 km2), all of it land.

23.2% of all households were made up of individuals, and 12.9% had someone living alone who was 65 years of age or older.