Concord, located in Contra Costa County, California, is the biggest city in the area. According to the United States Census Bureau, the city had a population of 129,295 in 2019, ranking it as the eighth largest city in the San Francisco Bay Area. Initially called Todos Santos by Don Salvio Pacheco II, a prominent California rancher, the city was later renamed Concord. It serves as a significant suburban center within the San Francisco Bay Area, specifically in the East Bay region, and is positioned 29 miles away from San Francisco. The Concord-Walnut Creek urban area, as defined by the Census Bureau, has a population of 538,583 as of the 2020 census, making it the 80th biggest urban area in the United States, with Concord as its primary city.