Atty. Keith E. Mattern

Atty. Keith E. Mattern

Keith E. Mattern is a lawyer.

St. Louis St. Louis 68 Years Experience 68 year
Call (309) 718-8598

Profile Summary

About Keith E. Mattern at a glance

Keith E. Mattern is an attorney based in St. Louis, Missouri. They have 68+ years of legal experience, licensed to practice since 1958. Admitted to practice in Missouri (1958). Educated at University of Missouri LL.B. (—) and University of Illinois B.S. (—). Recognitions include AV Preeminent. Serves clients in St. Louis, MO and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Keith E. Mattern is a lawyer
  • Keith received a B.S. degree from University of Illinois, and has been licensed for 68 years
  • Keith practices in St. Louis, MO

Jurisdictional Context

Why local counsel matters in Missouri

Practicing law in Missouri. Legal matters in Missouri are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in St. Louis are typically filed in the local municipal court or the appropriate Missouri state district court, depending on subject matter and amount in controversy. An attorney licensed in Missouri brings working knowledge of local procedural deadlines, judicial practices in this venue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in Missouri courts without local counsel or pro hac vice admission.

Looking for additional Missouri attorneys? Browse all attorneys in St. Louis or all attorneys in Missouri.

Frequently Asked

Common questions about Keith E. Mattern

Where is Keith E. Mattern's law office located?
Keith E. Mattern's law practice is located in St. Louis, Missouri. You can contact the office directly through this profile page.
How long has Keith E. Mattern practiced law?
Keith E. Mattern has 68+ years of legal experience and has been licensed since 1958.
Where did Keith E. Mattern go to law school?
Keith E. Mattern earned their education at (—); (—).
How can I contact Keith E. Mattern for a consultation?
You can contact Keith E. Mattern directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.
What awards or recognition has Keith E. Mattern received?
Keith E. Mattern's notable recognition includes: AV Preeminent.

Education

University of Missouri LL.B.
- In Progress
University of Illinois B.S.
- In Progress

Awards

AV Preeminent

Bar Admissions

Missouri
Admitted: 1958

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