Faith is a city in Meade County, South Dakota, United States. The population was 421 at the 2010 census. Sue, the most complete Tyrannosaurus rex skeleton known, was discovered about 15 miles north and east of Faith in December 1990.
Faith is located at 45°1′18″N 102°2′22″W / 45.02167°N 102.03944°W / 45.02167; -102.03944 (45.021648, -102.039502).
According to the United States Census Bureau, the city has a total area of 1.2 square miles (3.1 km²), all of it land.