Adirondack Regional Airport (IATA: SLK, ICAO: KSLK, FAA LID: SLK) is a public use airport located four nautical miles (5 mi, 7 km) northwest of the central business district of Saranac Lake, in Franklin County, New York, United States. The airport is owned by the Town of Harrietstown and is situated in the north-central Adirondacks two miles (3 km) from Lake Clear. It is served by one commercial airline, subsidized by the Essential Air Service program.

As per Federal Aviation Administration records, the airport had 4,252 passenger boardings (enplanements) in calendar year 2008, 4,809 enplanements in 2009, and 5,762 in 2010. It is included in the National Plan of Integrated Airport Systems for 2011–2015, which categorized it as a non-primary commercial service airport (between 2,500 and 10,000 enplanements per year).