Walnut Creek is an incorporated city located 16 miles (26 km) east of the city of Oakland. It lies in the East Bay region of the San Francisco Bay Area. While not as large as neighboring Concord, Walnut Creek serves as the business and entertainment hub for the neighboring cities within central Contra Costa County, due in part to its location at the junction of the highways from Sacramento and San Jose (I-680) and San Francisco/Oakland (SR-24), as well as its accessibility by BART. The city had a total population of 64,173 according to the 2010 U.S. Census. Walnut Creek is the headquarters of the Pac-12 Conference.
Walnut Creek is located in both the San Ramon Valley and the Ygnacio Valley below the western slopes of Mount Diablo.
The 2010 United States Census reported that Walnut Creek had a population of 64,173. The population density was 3,246.2 people per square mile.