Pekin is a city in Tazewell County, Illinois. Located on the Illinois River, it is the county seat and largest city of Tazewell County, and a key part of the Peoria metropolitan area. As of the 2000 census, its population is 33,857. Pekin has a large park with a lagoon, Mineral Springs Park, located near Pekin Hospital and a senior center. Pekin is home to a high-rise residential facility of the United Auto Workers. It is the home of the minimum-security Pekin Federal Correctional Institution. A regional insurance company, Pekin Insurance, has its home office in Pekin.