LaPorte County is a county located in the U.S. state of Indiana. As of 2020, the population was 112,417. The county seat is the city of La Porte, and the largest city is Michigan City. This county is part of the Northwest Indiana and Michiana regions of the Chicago metropolitan area. The LaPorte County Courthouse is located in the county seat of La Porte and is listed on the National Register of Historic Places.

La Porte is a city in LaPorte County, Indiana, United States, of which it is the county seat. Its population was estimated to be 21,341 in 2022. 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, Illinois–Indiana–Wisconsin combined statistical area.