Mount Pleasant is a town in Westchester County, New York, in the New York metropolitan area. As of the 2010 census, the town population was 43,724. The hamlets of Valhalla, Hawthorne, Pocantico Hills, and Thornwood, and the villages of Pleasantville, Sleepy Hollow, and a small portion of Briarcliff Manor lie within the town.
Mount Pleasant is located about 27 miles north of Manhattan. According to the United States Census Bureau, the town has a total area of 32.7 square miles (85 km), of which 27.7 square miles (72 km) is land and 5.0 square miles (13 km), or 15.26%, is water.
As of the census of 2000, there were 43,221 people, 13,737 households, and 10,522 families residing in the town. The population density was 1,560.5 people per square mile (602.4/km²). There were 13,985 housing units at an average density of 504.9 per square mile (194.9/km²). The racial makeup of the town was 84.25% Caucasian, 5.07% Black, 0.24% Native American, 3.26% Asian, 0.04% Pacific Islander, 5.02% from other races, and 2.11% from two or more races. Hispanic or Latino of any race were 14.01% of the population.
There were 13,737 households out of which 38.3% had children under the age of 18 living with them, 65.0% were married couples living together, 8.4% had a female householder with no husband present, and 23.4% were non-families. 18.4% of all households were made up of individuals and 7.5% had someone living alone who was 65 years of age or older. The average household size was 2.89 and the average family size was 3.30.
In the town, the population was spread out with 26.0% under the age of 18, 8.3% from 18 to 24, 30.7% from 25 to 44, 22.6% from 45 to 64, and 12.4% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 103.0 males. For every 100 females age 18 and over, there were 100.1 males.
The median income for a household in the town was $81,072, and the median income for a family was $96,403 (these figures had risen to $103,657 and $129,077 respectively as of a 2007 estimate). Males had a median income of $60,761 versus $41,023 for females. The per capita income for the town was $35,468. About 2.6% of families and 4.9% of the population were below the poverty line, including 4.2% of those under age 18 and 3.5% of those age 65 or over.