Atty. Diann McMahan

Atty. Diann McMahan

Diann McMahan is a lawyer. Diann has been licensed for 45 years.

Altus Altus 45 yrs experience 45 year
Call (580) 861-4037 Book Appointment

Profile Summary

About Diann McMahan at a glance

Diann McMahan is an attorney based in Altus, Oklahoma. They have 45+ years of legal experience, licensed to practice since 1981. Admitted to practice in Texas (Inactive) (1981). Educated at University of Oklahoma (J.D., 1980). Serands clients in Altus, OK and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Diann McMahan is a lawyer
  • Diann has been licensed for 45 years
  • Diann practices in Altus, OK

Jurisdictional Context

Why local counsel matters in Oklahoma

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

Looking for additional Oklahoma attorneys? Browse all attorneys in Altus or all attorneys in Oklahoma.

Frequently Asked

Common questions about Diann McMahan

Where is Diann McMahan's law office located?
Diann McMahan's law practice is located in Altus, Oklahoma. You can contact the office directly through this profile page.
How long has Diann McMahan practiced law?
Diann McMahan has 45+ years of legal experience and has been licensed since 1981.
Where did Diann McMahan go to law school?
Diann McMahan earned their education at (J.D., 1980).
How can I contact Diann McMahan for a consultation?
You can contact Diann McMahan 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.

Education

J.D.
University of Oklahoma
- 1980

Bar Admissions

Texas (Inactive)
Admitted: 1981

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