Atty. John Mark Wilka

Atty. John Mark Wilka

John Mark Wilka is a lawyer practicing domestic relations, criminal law, trial practice and 13 other areas of law. John received a B.A. degree from University of South Dakota in 1985, and has been licensed for 38 years.

Sioux Falls Sioux Falls 38 J. Erfahrung 38 year
Call (888) 968-9708 Book Appointment

Profile Summary

About John Mark Wilka at a glance

John Mark Wilka is a Partner based in Sioux Falls, South Dakota, practicing at Wilka Welter & Ash LLP. They have 38+ years of legal experience, licensed to practice since 1988. Their practice focuses on divorce, car accidents, child custody, personal injury, and criminal defense. Admitted to practice in South Dakota (1988), U.S. District Court, District of South Dakota, U.S. District Court, District of Minnesota and U.S. C (1988), and Minnesota (1995). Educated at University of South Dakota (J.D., 1988) and University of South Dakota (B.A., 1985). Recognitions include BV Distinguished. Active member of State Bar of South Dakota Minnesota State Bar Association Second Judicial Circuit Bar Association. Serands clients in Sioux Falls, SD and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

Über uns

  • John Mark Wilka is a lawyer practicing domestic relations, criminal law, trial practice and 13 other areas of law
  • John received a B.A. degree from University of South Dakota in 1985, and has been licensed for 38 years
  • John practices at Wilka Welter & Ash LLP in Sioux Falls, SD

Practice Areas Explained

John Mark Wilka's Areas of Practice

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

Divorce

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

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

Car Accidents

Hurt in a car crash? Car accident lawyers fight insurance companies for fair compensation — free consult, no fee unless you win.

John Mark Wilka is one of 36,807 car accidents attorneys indexed nationally. Browse car accidents attorneys in South Dakota →

Child Custody & Visitation

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

Personal Injury

Personal injury attorneys help accident victims recover compensation for medical bills, lost wages, and pain & suffering. Most work on contingency — no fee unless you win.

John Mark Wilka is one of 264,852 personal injury attorneys indexed nationally. Browse personal injury attorneys in South Dakota →

Criminal Defense

A criminal defense attorney protects your rights from arrest through trial. Find experienced lawyers handling DUI, drug, federal, theft, and violent-crime charges.

John Mark Wilka is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense 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 John Mark Wilka

Where is John Mark Wilka's law office located?
John Mark Wilka's law practice is located in Sioux Falls, South Dakota. The firm is Wilka Welter & Ash LLP. You can contact the office directly through this profile page.
What practice areas does John Mark Wilka handle?
John Mark Wilka focuses on divorce, car accidents, child custody, personal injury, criminal defense. Each practice area listed reflects experience handling cases of that type in South Dakota.
How long has John Mark Wilka practiced law?
John Mark Wilka has 38+ years of legal experience and has been licensed since 1988.
Where did John Mark Wilka go to law school?
John Mark Wilka earned their education at (J.D., 1988); (B.A., 1985).
How can I contact John Mark Wilka for a consultation?
You can contact John Mark Wilka 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 John Mark Wilka received?
John Mark Wilka's notable recognition includes: BV Distinguished.

Education

J.D.
University of South Dakota
- 1988
B.A.
University of South Dakota
- 1985

Awards

BV Distinguished

Bar Admissions

South Dakota
Admitted: 1988
U.S. District Court, District of South Dakota, U.S. District Court, District of Minnesota and U.S. C
Admitted: 1988
Minnesota
Admitted: 1995

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