White Marsh is an unincorporated community and census-designated place in Baltimore County, Maryland, United States. The population was 9,513 at the 2010 census.
White Marsh is located at 39°23′1″N 76°27′30″W / 39.38361°N 76.45833°W / 39.38361; -76.45833 (39.383621, −76.458315).
According to the United States Census Bureau, the CDP has a total area of 5.3 square miles (14 km), of which 5.3 square miles (14 km) is land and 0.19% or about 2.6 hectares (6.4 acres) is water.
Nearby towns include Perry Hall to the north, Rosedale to the southwest, Middle River to the south and Parkville to the west.
As of the census of 2000, there were 8,485 people, 3,337 households, and 2,355 families residing in the CDP. The population density was 1,603.0 people per square mile (619.3/km²). There were 3,420 housing units at an average density of 646.1/sq mi (249.6/km²). The racial makeup of the CDP was 87.78% White, 4.28% African American, 0.32% Native American, 5.40% Asian, 0.04% Pacific Islander, 0.92% from other races, and 1.27% from two or more races. Hispanic or Latino of any race were 2.19% of the population.
There were 3,337 households out of which 33.6% had children under the age of 18 living with them, 58.1% were married couples living together, 9.3% had a female householder with no husband present, and 29.4% were non-families. 22.1% of all households were made up of individuals and 3.9% had someone living alone who was 65 years of age or older. The average household size was 2.54 and the average family size was 3.01.
In the CDP, the population was spread out with 23.6% under the age of 18, 7.6% from 18 to 24, 34.2% from 25 to 44, 26.2% from 45 to 64, and 8.5% who were 65 years of age or older. The median age was 37 years. For every 100 females, there were 94.5 males. For every 100 females age 18 and over, there were 91.5 males.
The median income for a household in the CDP was $61,627, and the median income for a family was $70,600. Males had a median income of $46,171 versus $32,966 for females. The per capita income for the CDP was $26,317. About 3.1% of families and 2.7% of the population were below the poverty line, including 2.0% of those under age 18 and 7.9% of those age 65 or over.