Tremont, Indiana, is a ghost town formerly located in what is now the Indiana Dunes State Park and Indiana Dunes National Lakeshore in Westchester Township in northern Porter County, Indiana. It was first established in 1833. It was located at the intersection of U.S. Highway 12 and County Road 100 East, near Indiana 49. The community is named for three massive sand dunes that are now contained within the State park.