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

According to the United States Census Bureau, the CDP has a total area of 1.9 square miles (4.9 km2), all land.

27.0% of all households were made up of individuals, and 8.6% were someone living alone who was 65 years of age or older.

[5] At the 2000 census there were 11,076 people, 4,179 households, and 2,996 families living in the CDP.

There were 4,290 housing units at an average density of 2,212.8 per square mile (854.4/km2).

This Hamilton County, Ohio state location article is a stub.