The territory now contained within Bronx County was originally part of Westchester County, one of the 12 original counties of the English Province of New York. The present Bronx County was contained in the town of Westchester and parts of the towns of Yonkers, Eastchester, and Pelham. In 1846, a new town, West Farms, was created by division of Westchester; in turn, in 1855, the town of Morrisania was created from West Farms. In 1873, the town of Kingsbridge (roughly corresponding to the modern Bronx neighborhoods of Kingsbridge, Riverdale, and Woodlawn) was established within the former borders of Yonkers.

How many counties did New York originally have?