Meet the Treasurer - Treasurer

(Please see for the latest version of this information)

Home > Treasurer > Meet the Treasurer

Meet the Treasurer

The primary functions of the Treasurer’s Office

Treasurer – the responsibility to ensure all monies received by Ada County are deposited and accounted for in a timely manner. The Treasurer is also responsible for investing idle funds and ensuring there is adequate money available for the county to meet financial obligations.

Tax Collector – the responsibility to collect and account for all property taxes levied on the real, personal, and operating property tax rolls.

Public Administrator – the duty to administer the estates of decedents for whom no personal representative is appointed; the estates of decedents with whom there are no known heirs; estates ordered by the court and estates to which the State of Idaho is an heir.

Elizabeth “Beth” Mahn is a fourth-generation Idahoan committed to serving the citizens of Ada County.  In 2018, she was elected Ada County Treasurer.

The Ada County Treasurer manages and invest public funds, processes millions of dollars of property taxes on behalf of schools, cities, and other districts, and oversees public administration cases. Beth has the experience, qualifications and desire to faithfully discharge these duties.

Beth holds a B.S. in Business, Accounting major, summa cum laude, and a Juris Doctor degree, both from the University of Idaho.  She developed accounting best practices as an auditor for a “Big 5” public accounting firm.  Beth also clerked for the U.S. Bankruptcy Court during the Great Recession and then served over 5 years as an Ada County Deputy Prosecutor on civil matters, including property tax collections and bankruptcy.  In 2016, Beth began working in the Ada County Treasurer’s Office as Finance Manager and quickly advanced to Chief Deputy Treasurer.

Beth’s vision for the Ada County Treasurer’s Office is to implement innovative solutions that promote accountability, fiscal responsibility, and transparency. Beth plans to further revise the property tax bills and notices to better educate taxpayers and to make these documents more accessible electronically.  Her conservative investment philosophy emphasizes safety, followed by liquidity and yield.

Beth is deeply honored with the opportunity to serve the taxpayers of Ada County and is committed to protecting your tax dollars.


To embrace innovative solutions that promote accountability, fiscal responsibility, and transparency.


To serve citizens of Ada County and perform all duties impartially and efficiently.


Integrity, trustworthiness, responsibility, fairness, and respect.

Elizabeth Mahn, Ada County Treasurer