Catherine A. Dierker at a glance
- Current role
- Associate Circuit Judge
- Jurisdiction
- Missouri · State
- Judicial service
- Active
Catherine A. Dierker
Associate Circuit Judge · Missouri 22nd Judicial Circuit Court
Biography
Professional career
- She had been serving as Associate Circuit Judge in the 22nd Judicial Circuit since December 1, 2023, when she was sworn in by her father, retired Judge Robert H. Dierker
- Catherine Dierker was appointed on 2026-02-13 as Circuit Judge for Missouri 22nd Judicial Circuit Court
- Appointed Circuit Judge by Governor Mike Kehoe on February 13, 2026, succeeding retired Judge David C. Mason
- 13, 2026: Appointed Circuit Judge, marking a promotion to the full circuit bench
- 1, 2023: Sworn in as Associate Circuit Judge, the first daughter of a St. Louis judge to serve on the same bench
- Previously criminal prosecutor for Missouri Attorney General’s Office and St. Louis Circuit Attorney’s Office
Education
- in English Literature — George Washington University — B.A.
- in Anglo-Irish Literature and Drama — University College Dublin — M.A.
- Washington University School of Law in St. Louis — J.D.
Additional information
- 5, 2024: Retained in her associate judge role by a 57.9% vote in a retention election
- She is also a member of the Missouri Bar, U.S. District Court (Eastern & Western Districts of Missouri), Eighth Circuit Court of Appeals, and the St. Louis Lawyers Association
Applicable Court Rules & Procedures
Media Equipment Advance Approval
Statewide
Missouri Court Operating Rule 16 requires advance approval for media equipment used for courtroom coverage and allows the judge to control the number and setup of media personnel and equipment.
Failure to obtain advance approval for equipment may preclude its use in the proceeding.Missouri Court Operating Rule 16.04, Technical ↗
Device Use In Courtroom
Statewide
Missouri courtroom device use for media coverage is not generally permitted unless authorized by the operating rule, a local court rule, or the judge presiding in the proceeding.
No person may use any device capable of media coverage in a courtroom or court clerk's office unless specifically authorizedMissouri Court Operating Rule 16.04, Technical ↗
Remote appearances
Statewide
Missouri allows limited video and audio recording for media coverage under COR 16 technical limits, subject to judicial approval and courtroom controls.
Not more than one videographer, using a single device, shall be permitted in the courtroom during a judicial proceeding at any time.Missouri Court Operating Rule 16.04, Technical ↗
Published courtroom rules
Shared court rules
Missouri Court Operating Rule 16.04, Technical
Missouri 22nd Judicial Circuit Court
Scope is limited to the court class in the source claim. Shared court context only; case-type restrictions, exceptions, later amendments and case orders apply. This is not a personal preference or a complete rules inventory.
Official source ↗ · Collected 2026-07-26Sources
Identity source checked July 26, 2026.
Biography sources checked July 26, 2026.
Missouri Secretary of State Official Manual official judicial roster
Identity source · HTML · Source checked July 26, 2026
View Missouri Secretary of State Official Manual official judicial roster ↗Missouri Court Operating Rule 16.04, Technical
Statewide source · HTML · Source checked July 26, 2026
View Missouri Court Operating Rule 16.04, Technical ↗Governor Kehoe Announces Three Judicial Appointments
Appointments And Vacancies source · HTML · Source checked October 6, 2026
View Governor Kehoe Announces Three Judicial Appointments ↗