Tillamook Airport (IATA: OTK, ICAO: KTMK, FAA LID: TMK) is a public use airport located 3 miles (4.8 km) south of the central business district of Tillamook, a city in Tillamook County, Oregon, United States. It is owned by the Port of Tillamook Bay. According to the FAA's National Plan of Integrated Airport Systems for 2009–2013, it is categorized as a general aviation facility.

The airfield was developed from the former Naval Air Station Tillamook and serves as the home to the Tillamook Air Museum.

Although many U.S. airports use the same three-letter location identifier for the FAA and IATA, this facility is assigned TMK by the FAA and OTK by the IATA (which assigned TMK to Tam-Ky, Vietnam).