Plaster City is an unincorporated community in Imperial County in the U.S. state of California. It is located 17 miles (27 km) west of El Centro, at an elevation of 105 feet (32 m).
United States Gypsum operates a large gypsum quarry and plant there and owns the town. Plaster City has been noted for itsunusual place name. It is the site of the last industrial narrow gauge railroad in the United States. The 3 ft (914 mm) gauge line runs north to a gypsum quarry and brings gypsum from the quarry to the plant.
Plaster City is located at 32°47′33″N 115°51′31″W west of El Centro, California.
The first post office at Plaster City opened in 1924.
The ZIP Code is 92251. The community is inside area code 760.