Rye Brook is a village in Westchester County, New York, United States, within the town of Rye. The population was 9,347 at the 2010 census.
Rye Brook has been designated as a Tree City USA for 14 years.
As of the census of 2000, there were 8,602 people, 3,122 households, and 2,435 families residing in the village. The population density was 2,479.0 people per square mile (957.1/km²). There were 3,224 housing units at an average density of 929.1 per square mile (358.7/km²). The racial makeup of the village was 91.96% White, 1.03% African American, 0.21% Native American, 4.25% Asian, 0.02% Pacific Islander, 1.36% from other races, and 1.16% from two or more races. Hispanic or Latino of any race were 5.44% of the population.
There were 3,122 households out of which 37.6% had children under the age of 18 living with them, 68.4% were married couples living together, 7.3% had a female householder with no husband present, and 22.0% were non-families. 18.8% of all households were made up of individuals and 9.6% had someone living alone who was 65 years of age or older. The average household size was 2.72 and the average family size was 3.09.
In the village the population was spread out with 25.5% under the age of 18, 3.8% from 18 to 24, 27.9% from 25 to 44, 25.5% from 45 to 64, and 17.3% who were 65 years of age or older. The median age was 41 years. For every 100 females there were 90.2 males. For every 100 females age 18 and over, there were 87.4 males.