Westchester County Airport (IATA: HPN, ICAO: KHPN, FAA LID: HPN) is a county-owned airport in Westchester County, New York, United States, three miles (6 km) northeast of downtown White Plains, with territory in the towns of North Castle & Harrison, New York, and the village of Rye Brook, New York. It is sometimes referred to as the White Plains Airport and is so identified by the Official Airline Guide (OAG).

The airport primarily serves Westchester County, New York, and Fairfield County, Connecticut; the New York–Connecticut state border runs along its eastern perimeter. Located approximately 33 miles (53 km) north of Midtown Manhattan, it is also considered a satellite or reliever airport for the New York metropolitan area.

The National Plan of Integrated Airport Systems for 2011–2015 categorized HPN as a primary commercial service airport. Per Federal Aviation Administration records, the airport had 872,023 passenger enplanements in calendar year 2019.