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is a census-designated place (CDP) and township in Salt Lake County, Utah, United States. The population was 22,770 at the 2000 census, a moderate increase over the 1990 figure of 17,829. Magna is home to the Kennecott Smokestack, the tallest free-standing structure in the United States west of the Mississippi River according to the Kennecott website.
Magna is located at (40.701579, -112.085874) at an altitude of 4,300 feet above sea level.
According to the United States Census Bureau, the CDP has a total area of 7.4 square miles (19.2 km²), all of it land.