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is a city in Marion County, Indiana, United States. It is one of four "excluded cities" in Marion County. The city is home to Fort Benjamin Harrison within Fort Harrison State Park. The population was 38,915 as of the 2000 census.
According to the United States Census Bureau, the city has a total area of 20.2 square miles (52.3 km²), of which, 20.1 square miles (52.0 km²) of it is land and 0.1 square miles (0.3 km²) of it (0.50%) is water.