Northbrook, Ohio

Northbrook is a census-designated place (CDP) in 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 1.9 sqmi, all land.

2020 census
As of the census of 2020, there were 10,912 people living in the CDP, for a population density of 5,650.96 people per square mile (2,182.38/km2). There were 4,407 housing units. The racial makeup of the CDP was 48.9% White, 36.8% Black or African American, 0.4% Native American, 2.1% Asian, 0.1% Pacific Islander, 3.5% from some other race, and 8.1% from two or more races. 5.7% of the population were Hispanic or Latino of any race.

There were 4,058 households, out of which 34.3% had children under the age of 18 living with them, 36.6% were married couples living together, 17.5% had a male householder with no spouse present, and 32.6% had a female householder with no spouse present. 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. The average household size was 2.71, and the average family size was 3.21.

25.1% of the CDP's population were under the age of 18, 63.4% were 18 to 64, and 11.5% were 65 years of age or older. The median age was 35.5. For every 100 females, there were 109.4 males.

According to the U.S. Census American Community Survey, for the period 2016-2020 the estimated median annual income for a household in the CDP was $55,543, and the median income for a family was $61,192. About 16.7% of the population were living below the poverty line, including 26.9% of those under age 18 and 8.2% of those age 65 or over. About 64.0% of the population were employed, and 19.8% had a bachelor's degree or higher.

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 5,713.1 PD/sqmi. There were 4,290 housing units at an average density of 2,212.8 /sqmi. 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%.

Of the 4,179 households 34.7% had children under the age of 18 living with them, 51.0% were married couples living together, 15.7% had a female householder with no husband present, and 28.3% were non-families. 23.8% of households were one person and 9.0% were one person aged 65 or older. The average household size was 2.65 and the average family size was 3.13.

The age distribution was 28.7% under the age of 18, 8.0% from 18 to 24, 30.6% from 25 to 44, 21.0% from 45 to 64, and 11.7% 65 or older. The median age was 34 years. For every 100 females, there were 89.8 males. For every 100 females age 18 and over, there were 86.4 males.

The median household income was $44,573 and the median family income was $49,521. Males had a median income of $34,973 versus $24,781 for females. The per capita income for the CDP was $18,794. About 5.1% of families and 7.0% of the population were below the poverty line, including 10.3% of those under age 18 and 4.9% of those age 65 or over.