Originally inhabited by the Siwanoy Indians of the Algonquin tribe, the town of North Castle is located in Westchester County, New York.  The American Indians in the area were taken by force by Europeans in 1644, and in the early 1700’s, King William gifted the land to his favorite courtiers.

At that time, North Castle was a part of the Parish of Rye, which was organized as a community in 1693.  Upon becoming its own community, North Castle included all of the territory that became the incorporated town of New Castle in 1791.  The community that became North Castle was settled mostly by religious refugees, fleeing persecution in other areas of New England.  The eastern portion of the town was settled by residents of Massachusetts and Connecticut, while the western area (referred to as Armonk) was a refuge for Quakers from Rye and Long Island.

North Castle was incorporated on March 7, 1788, when New York passed an act requiring the counties of the state be divided into towns.  During the American Revolution, North Castle (as well as New Castle) were considered neutral territory, though its residents were very patriotic. 

In the 19th century, most of the inhabitants of North Castle were farmers, though some chose to supplement their income with small side businesses, such as shoemaking or tailoring.  Today, the citizens of North Castle actively participate in community activities and town affairs, making it a close-knit community.  Many consider North Castle an extremely pleasant, friendly place to live.