Big Oak Farm Airport (ICAO: 1MD1) is a small, privately owned general aviation airfield located near Cambridge, Maryland, in the United States. It serves personal and recreational flying needs for local pilots and landowners in the Dorchester County region of Maryland's Eastern Shore. The airport is not open to the public and operates as a private facility. It has no scheduled commercial service, no airlines, and no passenger terminals. Like many small farm-based airstrips in rural America, it primarily supports private light aircraft operations.