Mariposa-Yosemite Airport is a public airport located four miles (6 km) west of the central business district of Mariposa, in Mariposa County, California, United States. It is owned by the County of Mariposa.Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, Mariposa-Yosemite Airport is assigned MPI by the FAA but the IATA assigned MPI to Mamitupo, Panama).Facilities and aircraftMariposa-Yosemite Airport covers an area of 100acre which contains one asphalt paved runway (8/26) measuring 3,306 x 60 ft (1,008 x 18 m)(U.S.