Clinton County Airport (IATA: PLB, ICAO: KPLB, FAA LID: PLB) is a former county-owned public-use airport in Clinton County, New York, United States. It is located 3 nautical miles (5.6 km; 3.5 mi) west of the central business district of the city of Plattsburgh. It served Plattsburgh and the western side of Lake Champlain.

Clinton County transitioned to using the nearby Plattsburgh International Airport (44°39′03″N 073°28′05″W) as the primary airport for the region on June 18, 2007, and Clinton County Airport is now officially closed to itinerant aircraft, though it is still used for paradrops, and a few aircraft are still based there.

As per Federal Aviation Administration records, the airport had 1,712 passenger boardings (enplanements) in calendar year 2004 and 1,747 enplanements in 2005. According to the FAA's National Plan of Integrated Airport Systems for 2007–2011, Clinton County was categorized as a general aviation airport because the commercial service category required at least 2,500 passenger boardings per year.

In 1972, a FB-111A Aardvark landed at the airport after the pilot mistook the runway for the airport as being the nearby Plattsburgh Air Force Base.