Largest Employers

Many well-known companies are headquartered in Contra Costa County, and many others have chosen Contra Costa as their West Coast base of operations, capitalizing on our strategic location in the center of Northern California’s mega-region. No matter what mode of transportation your employees, customers, and suppliers prefer – they can reach you in Contra Costa.

Top 20 Largest Employers in Contra Costa County 

(all agencies, countywide, in alphabetical order)

Bay Alarm, Walnut Creek
Bay Area Rapid Transit, Richmond
Bio-Rad Laboratories, Hercules  
Chevron (various entities), San Ramon and Richmond
Contra Costa County, multiple locations
Contra Costa Regional Medical Center, Martinez  
Department of Veterans Affairs, Martinez
Job Connections, Danville
John Muir Medical Center, Concord and Walnut Creek
Kaiser Permanente, multiple locations
La Raza Market, Richmond        
Martinez Medical Offices, Martinez          
Robert Half International, San Ramon and Walnut Creek
Santa Fe Pacific Pipe Lines, Richmond    
Shell Oil Products, Martinez
St Mary's College, Moraga
Sutter Delta Medical Center, Antioch
Tesoro Golden Eagle Refinery, Pacheco
U.S. Veterans Medical Center, Martinez  
USS-Posco Industries, Pittsburg

Source: America’s Labor Market Information System Database, downloaded via State of California Employment Development Department, March 1, 2018.

Largest Private Employers in Unincorporated Contra Costa County

(employers with 100 or more employees in alphabetical order)

AAA of Northern California and Nevada
Allied Waste Services
Athenian School
Biocare Medical
Blackhawk Country Club
C & H Sugar Company
California Grand Casino
Del Monte Foods
Diablo Country Club
Federal Express Corporation
Henkel Corporation
High End Development
Overaa & Co
Palecek Imports
Paradigm Management Services
Phillips 66 Company
R J Roberts
Renaissance ClubSport
Robert Half International
Round Hill Country Club
RPM Mortgage
Sams Club
Shell Oil Products, U S
Tesoro Refining and Marketing

Source: Contra Costa County Treasurer and Tax Collector, January 2018

Largest Employers in Unincorporated County by Industry

largest employers industry chart