Westchester County, NY, has a rich and fascinating history that dates back to the early 16th century. European explorers first explored the area, including Giovanni da Verrazzano in 1524 and Henry Hudson in 1609. Dutch settlers started arriving in the Westchester area in the 1620s, followed by settlers from England in the 1640s.

Westchester County was one of the original twelve counties of the Province of New York, created by an act of the New York General Assembly in 1683. At its creation, Westchester County included present-day Bronx County and bordered Dutchess County to the north.

By 1775, Westchester County had become the wealthiest and most populous county in the colony of New York. The area was a key location during the American Revolution, which involved many battles. After the war, Westchester County became an important center for industry and commerce, with many factories and businesses setting up shop in the area.