Hammond ( ) is a city in Lake County, Indiana, United States. It is part of the Chicago metropolitan area, and the only city in Indiana to border Chicago. First settled in the mid-19th century, it is one of the oldest cities of northern Lake County. As of the 2020 United States census, it is also the largest in population. The 2020 population was 77,879, replacing Gary as the most populous city in Lake County. From north to south, Hammond runs from Lake Michigan down to the Little Calumet River; from east to west along its southern border, it runs from the Illinois state line to Cline Avenue. The city is traversed by numerous railroads and expressways, including the South Shore Line, Borman Expressway, and Indiana Toll Road. Notable local landmarks include the parkland around Wolf Lake and the Horseshoe Hammond riverboat casino. Part of the Rust Belt, Hammond has been industrial almost from its inception, but is also home to a Purdue University campus and numerous historic districts that showcase the residential and commercial architecture of the early 20th century. History The first permanent residents arrived around 1847 to settle on land between the Grand and Little Calumet Rivers, on the south end of Lake Michigan. Those first residents were German farmers newly arrived from Europe looking for land and opportunity. Before that time, the area was a crossroad for Indian tribes, explorers, stagecoach lines and supply lines to the West. Convenient location and abundant fresh water from Lake Michigan led to the beginning of Hammond's industrialization in 1869 with the George H. Hammond Company meat-packing plant following merchants and farmers to the area. Hammond was incorporated on April 21, 1884, and was named after the Detroit butcher. Hammond is one of the oldest cities in Lake County, with Crown Point being the oldest, established in 1834. According to the Encyclopedia of Chicago, George Henry Hammond, a pioneer in the use of refrigerated railcars for the transport of fresh meat, first used this method with his small packing company in Detroit, Michigan. In 1868, Hammond received a patent for a refrigerator car design. In the early 1870s, he built a new plant in northern Indiana along the tracks of the Michigan Central Railroad. By 1873, the George H. Hammond Co. was selling $1 million worth of meat a year; by 1875, sales were nearly $2 million. The company's large