NMCA may refer to:
National Mapping and Cadastral Agency, an organisation that produces topographic maps and geographic information of a country National Marine Conservation Areas, marine areas in Canada National Michael Chekhov Association, a dancing association; see National Muscle Car Association, a car association; see National Museum of Ceramic Art, a former museum in Maryland National Museum of Commercial Aviation, a former museum in the U.S. state of Georgia Nikolaev military-civilian administration