Local municipal plans indicate that the city intends to continue its expansion northwest, into an area unofficially considered part of Dunlap, Illinois.Peoria has a humid continental climate (Köppen Dfa), with cold, snowy winters, and hot, humid summers.The lands that eventually would become Peoria were first settled in 1680, when French explorers René-Robert Cavelier, Sieur de La Salle and Henri de Tonti constructed Fort Crevecoeur.Peoria was incorporated as a village on March 11, 1835.Three cultural institutions are located in Glen Oak Park.The Peoria Zoo, formerly Glen Oak Zoo, was expanded and refurbished in recent years. As of the 2010 census, the city was the seventh-most populated in Illinois (and the third largest outside of the Chicago metropolitan area), with a population of 115,007.
On the south end of Peoria's western border are Bartonville and the newly established city of West Peoria.was based in Peoria for over 110 years until announcing their move to Deerfield, IL in late 2017.Medicine has become a major part of Peoria's economy.The city did not have a mayor, though they had a village president, Rudolphus Rouse, who served from 1835 to 1836.The first Chief of Police, John B Lishk, was appointed in 1837. This was the end of a village president and the start of the mayoral system, with the first mayor being William Hale. Peoria is bounded on the east by the Illinois River except for the enclave of Peoria Heights, which also borders the river.
Grandview Drive, which Theodore Roosevelt purportedly called the "world's most beautiful drive" during a 1910 visit, runs through Peoria and Peoria Heights.