Bhumibol Dam Airport or Khuan Phumiphon Airport (, ) is an airfield located in Sam Ngao district, Tak province, Thailand.
Bhumibol Dam Airport was built to facilitate the transportation of personnel and materials during the construction of Bhumibol Dam, similarly to Uttaradit Airport. On June 24, 1961, his Majesty King Bhumibol Adulyadej the Great, along with Her Majesty Queen Sirikit departed from Don Mueang Airport and boarded the royal plane to Bhumibol Dam Airport. Afterwards they performed the groundbreaking ceremony and laid the foundation stone of the Bhumibol Dam.
On 31 May, 1977, Minister of Transport Lursakdi Sampatisiri officially approved Bhumibol Dam Airport as a licensed airport under Volume 94, Part 52 of the Royal Thai Government Gazette. As of 2003, the airport currently serves the Bhumibol Dam and is operated by the Electricity Generating Authority of Thailand.
Bhumibol Dam Airport is served by a small air terminal equipped with a control tower. The airfield consists of a single asphalt runway designated as 05/23, with a length of 4,899 ft and also a width of 98 ft. Originally runway 05/23, did not have any obstructions, however vegetation growth have appeared over time. Accommodated with the runway is a 951 ft long apron currently used as helipads.
As of 2010, Bhumibol Dam Airport uses aviation gasoline (AVGAS) for refueling purposes. For communications, the frequency of the airport is TWR 122.3 MHz (local control).