United Security Bancshares operates as the bank holding company for United Security Bank, a state-chartered bank that provides a range of commercial banking services to the business and professional community, and individuals in California.

The company accepts various deposit products, including personal and business checking accounts, savings accounts, interest-bearing negotiable order of withdrawal accounts, money market accounts, and time certificates of deposit.

It also provides real estate mortgage, commercial and industrial, real estate construction, and consumer loans, as well as agricultural, installment, and student loans.

In addition, the company offers online and mobile banking, safe deposit boxes, wire transfers, payroll direct deposit, cashier's check, cash management, traveler's check, money order, and foreign draft services, as well as interactive teller machines and ATM services.

As of January 26, 2022, it operated 12 full-service branch offices in Fresno, Bakersfield, Campbell, Caruthers, Coalinga, Firebaugh, Mendota, Oakhurst, San Joaquin, and Taft.

The company was founded in 1987 and is headquartered in Fresno, California.