The Frederick Municipal Airport (FDK) is located in Frederick, Maryland, USA. It is a public-use airport owned by the City of Frederick and operated by the Frederick Municipal Airport Authority.

The airport was first established in 1925 by the Frederick County Board of Commissioners and was initially known as the Frederick County Airport. It was the first airport to serve the county and was located on a former race track. The airport was constructed with a single asphalt runway and was used primarily by private pilots and corporate aircraft.

In 1955, the airport was renamed to the Frederick Municipal Airport and the airport authority was created. This change was made to reflect the fact that the airport was now owned and operated by the City of Frederick. The airport was further expanded in the late 1950s, with the addition of a second runway and a control tower. The airport was also expanded in the early 1960s with the addition of a modern terminal and other facilities.

The airport code FDK was determined by the International Air Transport Association (IATA). The code is derived from the airport's name, Frederick Municipal Airport.

Today, the Frederick Municipal Airport has an average of 30 flights a day, with a variety of airlines serving the airport, including Allegiant Air, American Airlines, Delta Air Lines, and United Airlines. The airport offers both domestic and international services.

The airport is named in honor of the county's first settlers, the Frederick family. The family was responsible for establishing the county and helping to shape its culture and industry. The name was chosen to honor their legacy and to recognize their contribution to the community.

The Frederick Municipal Airport is an important part of the local economy and provides a vital service to the region. It is a hub for business, leisure, and medical travel, and it is a gateway to the world. The airport offers a wide range of services and amenities, and is an important part of the local culture and identity.