Atty. Mark Thiel Steffan

Atty. Mark Thiel Steffan

Mark Thiel Steffan is a lawyer practicing family law, real estate, wills and 34 other areas of law. Mark received a B.A. degree from Minnesota State University in 1979, and has been licensed for 38 years.

Sioux Falls Sioux Falls 38 yrs experience 38 year
Call (605) 800-5209 Book Appointment

Profile Summary

About Mark Thiel Steffan at a glance

Mark Thiel Steffan is a Member based in Sioux Falls, South Dakota, practicing at Steffan Law Office, PLLC. They have 38+ years of legal experience, licensed to practice since 1988. Their practice focuses on dui/dwi, divorce, wills, chapter 7, and child custody. Admitted to practice in Minnesota (1988), U.S. District Court, District of Minnesota (1989), and South Dakota (2005). Educated at University of Minnesota, Minneapolis (J.D., 1987) and Minnesota State University (B.A. Psychology, 1979). Recognitions include Peer Reviewed. Serands clients in Sioux Falls, SD and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • Mark Thiel Steffan is a lawyer practicing family law, real estate, wills and 34 other areas of law
  • Mark received a B.A. degree from Minnesota State University in 1979, and has been licensed for 38 years
  • Mark practices at Steffan Law Office, PLLC in Sioux Falls, SD

Practice Areas Explained

Mark Thiel Steffan's Areas of Practice

Each practice area below reflects the types of cases Mark Thiel Steffan handles, with a brief overview of what that area of law covers.

DUI / DWI Defense

Find experienced DUI and DWI defense attorneys near you. Compare verified profiles, read client reviews, and consult about your case for free.

Mark Thiel Steffan is one of 29,976 dui/dwi attorneys indexed nationally. Browse dui/dwi attorneys in South Dakota →

Divorce

A divorce attorney guides you through property division, spousal support, custody, and the final decree — contested or uncontested.

Mark Thiel Steffan is one of 50,487 divorce attorneys indexed nationally. Browse divorce attorneys in South Dakota →

Wills

Mark Thiel Steffan is one of 34,541 wills attorneys indexed nationally. Browse wills attorneys in South Dakota →

Chapter 7 Bankruptcy

Mark Thiel Steffan is one of 8,885 chapter 7 attorneys indexed nationally. Browse chapter 7 attorneys in South Dakota →

Child Custody & Visitation

Mark Thiel Steffan is one of 31,241 child custody attorneys indexed nationally. Browse child custody attorneys in South Dakota →

Jurisdictional Context

Why local counsel matters in South Dakota

Practicing law in South Dakota. Legal matters in South Dakota are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Sioux Falls are typically filed in the local municipal court or the appropriate South Dakota state district court, depending on subject matter and amount in controversy. An attorney licensed in South Dakota 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 South Dakota courts without local counsel or pro hac vice admission.

Looking for additional South Dakota attorneys? Browse all attorneys in Sioux Falls or all attorneys in South Dakota.

Frequently Asked

Common questions about Mark Thiel Steffan

Where is Mark Thiel Steffan's law office located?
Mark Thiel Steffan's law practice is located in Sioux Falls, South Dakota. The firm is Steffan Law Office, PLLC. You can contact the office directly through this profile page.
What practice areas does Mark Thiel Steffan handle?
Mark Thiel Steffan focuses on dui/dwi, divorce, wills, chapter 7, child custody. Each practice area listed reflects experience handling cases of that type in South Dakota.
How long has Mark Thiel Steffan practiced law?
Mark Thiel Steffan has 38+ years of legal experience and has been licensed since 1988.
Where did Mark Thiel Steffan go to law school?
Mark Thiel Steffan earned their education at (J.D., 1987); (B.A. Psychology, 1979).
How can I contact Mark Thiel Steffan for a consultation?
You can contact Mark Thiel Steffan 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 Mark Thiel Steffan received?
Mark Thiel Steffan's notable recognition includes: Peer Reviewed.

Education

J.D.
University of Minnesota, Minneapolis
- 1987
B.A. Psychology
Minnesota State University
- 1979

Awards

Peer Reviewed

Bar Admissions

Minnesota
Admitted: 1988
U.S. District Court, District of Minnesota
Admitted: 1989
South Dakota
Admitted: 2005

Reviews

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2 Review
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