Porter is a town in Westchester Township, Porter County, in the U.S. state of Indiana. The population was 5,210 as of the 2020 census. Porter is in the Indiana Dunes ecosystem, which played a role in the creation of The Nature Conservancy, and inspired conservation efforts. It is home to Porter Beach, also known as Johnson's Beach, on Lake Michigan. Porter is noted for its proximity to Indiana Dunes State Park and for its railroad heritage.