Diablo Valley

{{refimprove|date=February 2013}}

{{Infobox settlement

|native_name={{langx|es|Valle del Diablo}}{{disputed inline|talk=WT:CAL#Native names for landforms in California|date=March 2019}}

|coordinates={{Coord|37.9419|-122.0598|display=title, inline}}

|image_skyline=Mount Diablo from San Ramon 1866.jpg|image_caption=A view of Mount Diablo from the San Ramon Valley|map_caption=Location in Contra Costa County and the state of California}}

The Diablo Valley refers to a valley in the East Bay of the San Francisco Bay Area, to the west/northwest of Mount Diablo.{{cite web|title=Diablo Valley|url=http://geology.about.com/od/geophoto_tours/ig/San-Francisco-Bay-Geo-Photos/diablofoothills.htm|publisher=About.com|accessdate=3 January 2013|archive-date=28 March 2013|archive-url=https://web.archive.org/web/20130328195056/http://geology.about.com/od/geophoto_tours/ig/San-Francisco-Bay-Geo-Photos/diablofoothills.htm|url-status=dead}} The valley contains the cities of Clayton, Concord, Martinez, Pleasant Hill (home to Diablo Valley College), most of Walnut Creek (The southern end is a part of the San Ramon Valley) and the CDP of Pacheco. The Diablo Valley has a diverse population both ethnically, and socio-economically. West of the Diablo Valley lies the Briones Regional Park and the Lamorinda area.