The Town of North Castle comprises approximately 26 square miles and is situated at the narrow waist of Westchester County. The bulk of the Town's land area lies north of this corner, but the most densely populated part of the town lies to the south. The Kensico Reservoir separates these two parts of North Castle. The Town of North Castle is divided into three distinct geographic areas: North White Plains, Armonk, and the Eastern District, the hamlet of Banksville.

A Bit of History
The Indians of North Castle were the Siwanoys, who belonged to the Wappinger Confederacy, and were part of the Algonkian-speaking group. Their place names and the names of the sachems (chiefs) remain today. Sachem Wampus gave his name to Wampus Pond and stream; Sachem Mayano’s name lives on in the Mianus Gorge and River; from Sachem Cokenseko comes Kensico Reservoir and the lost village of Kensico; Cohamong became Coman as in Coman Hill School, and variations of Armonck (the name the Indians called Byram River) undoubtedly gave us Armonk.

In 1701 England’s King William III gave his favorite courtiers the Middle Patent (now the eastern part of North Castle) and the West Patent (now the western section). People from Massachusetts and Connecticut settled the eastern portion (the earliest part), and Quakers from Rye and Long Island gathered around today’s Armonk.

North Castle’s name is derived from an Indian encampment located on the hill where the IBM Corporation World Headquarters stands today. The site was called "North Fort" and because early settlers felt it resembled a castle, it became "North Castle".

History And Antiquities
The following covers "History and Antiquities", a general collection of interesting facts, traditions, biographical sketches, and anecdotes about Westchester County and its towns. When reading the following, remember to keep in mind that this information has been written about two hundred years ago. Population statistics and events have not been revised to reflect current events and perspective. We think this adds to the historical flavor and interest of the writings, giving a different perspective on much of this information and written in an "older world" writing style. "Historical Collections of the State of New York, Published by S. Tuttle, 194 Chatham-Square, 1841

North Castle
"Northcastle is 36 miles NE. from New York, and centrally distant 5 SW. of Bedford. Pop. 2,058. Northcastle is a post-office, around which there is a small settlement."