Elmsford is a village in Westchester County, New York, United States. It is part of the New York metropolitan area. Roughly one mile square, the village is fully contained within the borders of the town of Greenburgh. As of the 2010 census, the population of Elmsford was 4,664.
As of the census of 2010, there were 4664 people, 1,618 households, and 1101 families residing in the village. The population density was 4306 people per square mile (1,641.3/km²). There were 1618 housing units at an average density of 1,585.9 per square mile (610.0/km²).
There were 1,618 households out of which 32.0% had children under the age of 18 living with them, 47.5% were married couples living together, 13.2% had a female householder with no husband present, and 32.0% were non-families. 25.5% of all households were made up of individuals and 6.8% had someone living alone who was 65 years of age or older. The average household size was 2.88 and the average family size was 3.39.
The village population was spread out with 22.1% under the age of 18, 12.8% from 18 to 24, 33.5% from 25 to 44, 24.4% from 45 to 64, and 10.8% who were 65 years of age or older. The median age was 35.1 years. Males make up 50.9% of the population while women make up 49.1% of the population 
The racial makeup of the village was 46.4%% White, 20.5% African American, 0.6% Native American, 10.5% Asian, 0% Pacific Islander, 18.0% from other races, and 4.1% from two or more races. Hispanic or Latino of any race were 38.0% of the population.
The median income for a household in the village was $74,069, and the median income for a family was $84,698. Males had a median income of $43,649 versus $41,356 for females. The per capita income for the village was $32,448. About 8.58% of families and 10.86% of the population were below the poverty line.