Emergency Biohazard Cleanup Near Ayers Ranch Concord, CA

Concord was founded in 1869 as 'Todos Santos' by Don Salvio Pacheco II, a noted Californio ranchero, and the town's name was later changed to Concord.

Concord's downtown still centers on Todos Santos Plaza, the square laid out by the Pacheco family at the town's founding.

The land beneath Concord was part of Rancho Monte del Diablo, a Mexican land grant made to Salvio Pacheco in 1834 at the base of Mount Diablo.

With 125,410 residents in the 2020 census, Concord is the most populous city in Contra Costa County and the tenth most populous city in the San Francisco Bay Area.

Concord has about 46,200 households with roughly 2.64 people per household, and about 62% of its homes are owner-occupied.

Before European settlement, the valleys north of Mount Diablo around Concord were inhabited by the Miwok people, who hunted elk and fished the streams flowing to San Francisco Bay.

Mt. Diablo High School, opened in 1901, is one of Concord's oldest institutions and now houses four specialized academies including the Digital Safari Academy.

Concord is served by the Mount Diablo Unified School District, one of the larger school districts in Contra Costa County.

The Concord-Walnut Creek urban area, anchored by Concord, had a population of 538,583 in the 2020 census, separate from the San Francisco-Oakland urban area.

Concord sits at the northern foot of Mount Diablo, whose summit in Mount Diablo State Park rises over the city and is visible from much of the East Bay.