Hastings-on-Hudson is a village in Westchester County located in the southwestern part of the town of Greenburgh in the state of New York, United States. It's a suburb of New York City, located approximately 20 miles (32 km) north of midtown Manhattan, and is served by a stop on the Metro-North Hudson Line. To the north of Hastings-on-Hudson is the village of Dobbs Ferry, to the south, the city of Yonkers, and to the east unincorporated parts of Greenburgh. As of the 2020 US Census, it had a population of 8,590. The town lies on U.S. Route 9, "Broadway" and the Saw Mill River Parkway.

Westchester County is located in the U.S. state of New York. It is the seventh most populous county in the State of New York and the most populous north of New York City. According to the 2020 United States Census, the county had a population of 1,004,456, its highest decennial count ever and an increase of 55,344 (5.8%) from the 949,113 counted in 2010. Westchester covers an area of 450 square miles (1,200 km2), consisting of six cities, 19 towns, and 23 villages. Established in 1683, Westchester was named after the city of Chester, England. The county seat is the city of White Plains, while the most populous municipality in the county is the city of Yonkers, with 211,569 residents per the 2020 census. The county is part of the Hudson Valley region of the state.