Northbrook is a census-designated place (CDP) in Colerain Township, Hamilton County, Ohio, United States. The population was 10,912 at the 2020 census.
Geography
According to the United States Census Bureau, the CDP has a total area of , all land.
Demographics
2020 census
As of the 2020 census, Northbrook had a population of 10,912 and a population density of 5,650.96 people per square mile (2,182.38/km<sup>2</sup>). The median age was 34.9 years. 26.8% of residents were under the age of 18 and 13.6% were 65 years of age or older. For every 100 females, there were 87.8 males, and for every 100 females age 18 and over, there were 82.0 males age 18 and over.
100.0% of residents lived in urban areas, while 0.0% lived in rural areas.
There were 4,176 households in Northbrook, of which 33.6% had children under the age of 18 living in them. Of all households, 33.1% were married-couple households, 18.6% were households with a male householder and no spouse or partner present, and 39.3% were households with a female householder and no spouse or partner present. About 28.7% of all households were made up of individuals, and 11.3% had someone living alone who was 65 years of age or older. The average household size was 2.71, and the average family size was 3.21.
2000 census
At the 2000 census there were 11,076 people, 4,179 households, and 2,996 families living in the CDP. The population density was . There were 4,290 housing units at an average density of . The racial makeup of the CDP was 82.15% White, 14.16% African American, 0.35% Native American, 0.97% Asian, 0.09% Pacific Islander, 0.57% from other races, and 1.72% from two or more races. Hispanic or Latino of any race were 1.56%.