Chico is the most populous city in Butte County, California, United States. The population was 86,187 at the 2010 census, up from 59,954 at the time of the 2000 census. The city is a cultural, economic, and educational center of the northern Sacramento Valley and home to both California State University, Chico and Bidwell Park, one of the country's 25 largest municipal parks and the 13th largest municipally-owned park, Bidwell Park, which makes up over 17% of the city.
Other cities in close proximity to the Chico Metropolitan Area (population 212,000) include Paradise and Oroville, while local towns and villages (unincorporated areas) include Durham, Cohasset, Dayton, Hamilton City, Nord, and Forest Ranch. The Chico Metropolitan Area is the 14th largest Metropolitan Statistical Area in California.
The official city nickname is "City of Roses", according to the Seal of the City of Chico, California. Chico has been designated a Tree City USA for 27 years by the National Arbor Day Foundation.