County Auditor

Duties and Mission

Our mission is to partner with County Departments and Offices to help enhance the quality of services for all St. Louis County Employees and County Residents.


Our primary duties:


  • Review the County accounting system and recommend changes as deemed necessary for the greater economy and the efficiency of public funds
  • Audit the accounts and records of accountable officers and employees of the County
  • Investigate all matters relating to the receipt, disbursement, and application of public funds
  • Make such other investigations and reports in relation to fiscal matters as directed by the Council

Committee Meeting

Below is a downloadable audio file of a recent committee meeting. 

Committee Meeting

County External Audits

The external audits linked on the St. Louis County Auditor’s Website are independent external audits conducted by external auditors as described in each report. The links to the audits are provided on this website to enhance transparency, convenience, and accessibility to information regarding St. Louis County Government.

National Museum of Transportation Independent Audit Report 2018

Children Service Fund
Consulting Engagement 1/1/2015 - 12/31/2016
Consulting Engagement 1/1/2017 - 12/31/2017

2016 CAFR (complete report)

2017 CAFR (complete report)

2018 CAFR (complete report)

St. Louis County
Animal Care and Control Evaluation
July 5, 2019
Prepared by:
Folsom, California
Animal Care and Control Audit

St. Louis County Retirement Plan
Actuarial Valuation Report – Full Version
Plan Year: January 1, 2019 – December 31, 2019
Issued June 2019
Valuation Report

St. Louis County Retirement Plan
January 1, 2019 Actuarial Valuation Results Summary
Board Presentation Version
Presented June 27, 2019
Board Presentation Version

Uniform Guidance Single Audit Report
Year Ended December 31, 2016
Contact Us
Mark Tucker
St. Louis County Auditor 

41 South Central Ave. 1st Floor
Clayton, MO 63105

Phone: 314-615-5491
Fax: 314-615-7890
Confidential Fraud Hotline: 314-615-7000
E-Mail: [email protected]