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is a city in St. Joseph County in the U.S. state of Michigan. The population was 7,328 at the 2000 census.
Three Rivers derives its name from the confluence of the St. Joseph River with its tributaries the Rocky and Portage Rivers. It is the home of St. Gregory's Abbey, a Benedictine monastery of the Episcopal Church that was established in 1946.
According to the United States Census Bureau, the city has a total area of 4.7 square miles (12.3 km²), of which, 4.5 square miles (11.7 km²) of it is land and 0.2 square miles (0.6 km²) of it (5.06%) is water.