Hammond Northshore Regional Airport (ICAO: KHDC, FAA LID: HDC) is a city-owned, public-use, joint civil-military, general aviation airport located three nautical miles (6 km) northeast of the central business district of Hammond, a city in Tangipahoa Parish, Louisiana, United States. The airport was previously an uncontrolled facility utilizing VHF-band UNICOM as a Common Traffic Advisory Frequency (CTAF). As a result of the relocation of Army National Guard flight operations from Lakefront Airport to Hammond, a new control tower was constructed at the airport.