Phonxay Keokham, CPA

Treasurer-Tax Collector

About Phonxay

"As your Treasurer-Tax Collector I promise to serve on your behalf with integrity and honor. I will safeguard the funds entrusted to me and ensure our team members provide service in a professional manner. I will use my education and experience to continue to reduce cost and improve services to the residents of San Joaquin County."


Phonxay Keokham, CPA

Treasurer-Tax Collector

San Joaquin County


After graduating from Amos Alonzo Stagg High School in Stockton, California, Mr. Keokham enlisted in the Army and served as an infantryman. He was stationed overseas in Baumholder, Germany and was assigned to 3-12th Infantry of the 1st Armored Division. He was a member of a Quick Reaction Force that was deployed to the Former Republic of Yugoslavia in support of Operation Able Sentry and to Bosnia in support of Operation Joint Endeavor. He earned the coveted Expert Infantryman's Badge and was honorably discharged after three years of service. He is a proud member of the American Legion Karl Ross Post 16 and a  Life member of the Veterans of Foreign Wars. 

On June 5, 2018, Mr. Keokham was elected as San Joaquin County’s 18th Treasurer-Tax Collector. He is responsible for overseeing a $5.3 billion investment pool for San Joaquin County, local schools, and special districts. He also manages the collection of $1.2 billion in property taxes and delinquent debts owed to San Joaquin County.

In addition, Mr. Keokham serves as an ex-officio Board Member of the San Joaquin County Employees' Retirement Association (SJCERA) and is a member of the San Joaquin County’s Deferred Compensation Advisory Committee. As a SJCERA Board Member Mr. Keokham is responsible for the investment of over $4.1 billion.

Mr. Keokham currently serves as the President-Elect of the  California Association of County Treasurers and Tax Collectors (CACTTC). He has also held the following positions on CACTTC’s Executive Committee: 

2021-2022 - 1st Vice President and Mother Lode Area Chair

2020-2021 - 2nd Vice President

2019-2020 - Treasurer and Mother Lode Area Chair


In accordance with the California Government Code,

Mr. Keokham exceeds the minimum requirements for County Treasurer-Tax Collector.

Before being elected to Treasurer-Tax Collector, Mr. Keokham served as the Assistant Treasurer-Tax Collector. He has over 16 years of experience with San Joaquin County and over five years of experience as a tax auditor with the California Franchise Tax Board.

Mr. Keokham is a Certified Public Accountant. He possesses a master’s degree in Business Administration from the California State University, Stanislaus and bachelor’s degrees in both Business Management and Accounting from Humphreys University.

Mr. Keokham has also completed the Public Pension Investment Management Program from the University of California, Berkeley Hass School of Business.