West Lafayette is a city in Tippecanoe County, Indiana, United States. It is located about northwest of the state capital of Indianapolis and southeast of Chicago. West Lafayette is directly across the Wabash River from its sister city, Lafayette. As of the 2010 census, its population was 29,596. It is the most densely populated city in Indiana and is home to Purdue University. West Lafayette is part of the Lafayette, Indiana metropolitan area.