Groesbeck is a census-designated place (CDP) in Colerain Township, Hamilton County, Ohio, United States.

When the community established a post office in 1857 it was discovered there was already a West Union in Ohio and so the name was changed.

[4] The new name was taken from the surname of William S. Groesbeck, a United States Representative from Ohio.

[6] According to the United States Census Bureau, the CDP has a total area of 2.9 square miles (7.5 km2), all land.

33.4% of all households were made up of individuals, and 9.3% were someone living alone who was 65 years of age or older.

There were 2,857 housing units at an average density of 972.3 per square mile (375.4/km2).

24.5% of all households were made up of individuals, and 11.2% had someone living alone who was 65 years of age or older.