Lafayette is a city in Tippecanoe County, Indiana, 63 miles (101 km) northwest of Indianapolis. Population in 1900, 18,116; in 1910, 20,081; in 1920, 22,486; and in 1940, 28,798 people. As of the 2000 census, the city had a total population of 56,397. The city is the county seat of Tippecanoe CountyGR6. West Lafayette, just across the Wabash River, is home to Purdue University, which has a large impact on both Communities.

Lafayette and West Lafayette form the core of the Lafayette, IN Metropolitan Statistical Area, which, as of the 2000 census, had a total population of 183,340; Lafayette is thus the 215th largest metropolitan area in the United States.