Tununak Airport (IATA: TNK, FAA LID: 4KA) is a state-owned, public-use airport located one nautical mile (1.85 km) southwest of the central business district of Tununak, in the Bethel Census Area of the U.S. state of Alaska.

As per Federal Aviation Administration records, this airport had 1,809 commercial passenger boardings (enplanements) in calendar year 2008, a decrease of 9.6% from the 2,001 enplanements in 2007. Tununak Airport is included in the FAA's National Plan of Integrated Airport Systems (2009–2013), which categorizes it as a general aviation facility.