Michigan City is a city in LaPorte County, Indiana, United States. It is one of the two principal cities of the Michigan City-La Porte, Indiana Metropolitan statistical area, which is included in the Chicago-Naperville-Michigan City Combined statistical area. In the region known to locals as Michiana, the city is about 50 miles (80 km) east of Chicago and 40 miles (64 km) west of South Bend. It had a population of 31,479 at the 2010 census.