Michigan City is a city in LaPorte County, Indiana, United States. It had a population of 32,075 at the 2020 census. Located along Lake Michig…Michigan City is a city in LaPorte County, Indiana, United States. It had a population of 32,075 at the 2020 census. Located along Lake Michigan in the Michiana region, the city is about 45 miles east of Chicago and is 40 miles west of South Bend.