Lafayette ( , ) is a city in and the county seat of Tippecanoe County, Indiana, United States, located northwest of Indianapolis and southeast of Chicago. West Lafayette, on the other side of the Wabash River, is home to Purdue University, which contributes significantly to both communities. Together, Lafayette and West Lafayette form the core of the Lafayette metropolitan area, which had a population of 224,709 in the 2021 US Census Bureau estimates. According to the 2020 United States Census, the population of Lafayette was 70,783, a 25% increase from 56,397 in 2000. Meanwhile, the 2020 Census listed the neighboring city of West Lafayette at 44,595 and the Tippecanoe County population at 186,291. Lafayette was founded in 1825 on the southeast bank of the Wabash River near where the river becomes impassable for riverboats upstream, though a French fort and trading post had existed since 1717 on the opposite bank and three miles downstream. It was named for the French general Marquis de Lafayette, a Revolutionary War hero. History When European explorers arrived at this area, it was inhabited by a tribe of Miami Indians known as the Ouiatenon or Weas. In 1717, the French government established Fort Ouiatenon across the Wabash River and three miles (5 km) south of present-day Lafayette. The fort became the center of trade for fur trappers, merchants and Indians. An annual reenactment and festival known as Feast of the Hunters' Moon is held there each autumn. The town of Lafayette was platted in May 1825 by William Digby, a trader. It was designated as the county seat of the newly formed Tippecanoe County the following year. Like many frontier towns, Lafayette was named for General Lafayette, a French officer who significantly aided George Washington's Continental Army during the American Revolutionary War. Lafayette toured the United States in 1824 and 1825. In its earliest days, Lafayette was a shipping center on the Wabash River. In 1838, Henry Leavitt Ellsworth, the first United States Patent Commissioner, published a booklet titled Valley of the Upper Wabash, Indiana, with Hints on Its Agricultural Advantages, to promote settlement of the region. By 1845, Ellsworth had purchased of farmland around Lafayette and moved there from Connecticut to supervise land sales. By 1847 Ellsworth was distributing broadsides looking for farmers to purchase his farmland. He became president of the Tippecanoe County Agricultural Society in April 1851 – despite some local resentment