Orange County is a county located in the U.S. state of New York. It is part of the Poughkeepsie–Newburgh–Middletown, NY Metropolitan Statistical Area and is located at the northern reaches of the New York metropolitan area. The county is in the state's Mid-Hudson Region of the Hudson Valley. It was named in honor of William III of Orange, who was greatly esteemed by the English settlers of the region.
Orange County was one of the first twelve counties established by the Province of New York in 1683. Its boundaries at that time included present-day Rockland County, which split from Orange County in 1798 following the American Revolutionary War. Due to its small population, the original Orange County was not fully independent and shared government functions with other counties. The first public buildings were erected in Orangetown in 1703, and the first court was established in 1801.
Due to a boundary dispute between New York and New Jersey, the extent of many of the southern towns of the county was not established until the 19th century.