http://www.lafayette.in.gov Lafayette ( /ˌlɑːfiːˈɛt/ or lah-fee-YET) is a city in and the county seat of Tippecanoe County, Indiana, United States, 63 miles (101 km) northwest of Indianapolis. West Lafayette, on the other side of the Wabash River, is home to Purdue University, which has a large impact on both communities. Together, Lafayette and West Lafayette form the core of the Lafayette, IN Metropolitan Statistical Area. According to the 2010 census, its population was 67.140, an increase of 19% from 56,397 in 2000.