Indiana's 4th congressional district is a congressional district in the U.S. state of Indiana. From 2003 to 2013 the district was based primarily in the central part of the state, and consisted of all of Boone, Clinton, Hendricks, Morgan, Lawrence, Montgomery, and Tippecanoe counties and parts of Fountain, Johnson, Marion, Monroe, and White counties. The district surrounded Indianapolis including the suburban area of Greenwood and encompassed the more exurban areas of Crawfordsville and Bedford, as well as the college town of Lafayette-West Lafayette, containing Purdue University.

Montgomery County is a county in the U.S. state of Indiana. As of the 2020 United States census, it had a population of 37,936. Its county seat is Crawfordsville. The county is divided into eleven townships which provide local services.