It was located in the northeastern part of Staten Island prior to the incorporation of Staten Island into New York City in 1898.
It had a total area of 3880 acres (15.7 km2) and was bounded by Upper New York Bay on the east and the Kill Van Kull on the north.
It was originally set aside as the manor of the governor of the Province of New York and takes its name from the manor of Governor Thomas Dongan who named it for his home Castletown, in the town Kildrought (now Celbridge) in County Kildare, Ireland.
[1] The town was dissolved in 1898 upon consolidation into the City of New York.
This article about a location on Staten Island, New York is a stub.