Mark E. Sostarich - an Elkhorn, Wisconsin (WI) Divorce Lawyer

Elkhorn Divorce Lawyer

Updated: 05/11/2026

Areas of Practice

Divorce
Construction Law
Custody & Visitation
Family Law
Litigation & Appeals
Corporate Law
Real Estate

Attorney Information

Overview

I have argued cases before the Wisconsin Supreme Court; the Wisconsin Court of Appeals; the Illinois Court of Appeals; and the Federal Seventh Circuit Court of Appeals.

I was appointed by the Governor of Wisconsin five times to the Wisconsin State Elections Board and I served as its Chairman for a term. I was appointed to the City of South Milwaukee Police and Fire Commission where I served as Secretary and later President. I also was appointed to the City of South Milwaukee Housing Authority.

I was elected to five terms as the Chair of the Milwaukee County Democratic Party serving for ten years. I also was elected and severed as the First Vice Chair and later Chair of the Wisconsin Democratic Party. I served on the Democratic National Committee, as well as the National Chairs' Association. I chaired and led Wisconsin's Delegation to the Democratic National Convention in 1996.

I have often served as a consultant or attorney to local, state and national campaigns and candidates. I am pleased to call many elected officials as my friends.

I am very active in my local church, Trinity Lutheran Church in South Milwaukee. I have served as Vice-President and President of the Church Council. I am the church's unofficial lawyer. I have taught the High School Sunday School class for over twenty-five years. I was a Deacon at the Church when we still had that role. I currently am a head usher. I have assisted in fundraising and outreach and I have often represented church members on a pro bono basis.

I previously served on the Board of Directors for the Wisconsin Arthritis Organization. I also served on the Wisconsin Law School's Board of Visitors.

I enjoy photography. Along with my daughter Samantha, we designed and care for the flower displays and holiday decorations at the office. The office is active in the local Elkhorn Chamber of Commerce. We have entered and won for our floats in the city's annual Christmas parade. We help sponsor local teams, the recreation department, fire departments educational programs etc. We decorate our 150 year old office for Halloween and are active in the neighborhoods celebration of the event.

My wife and I have been married for over forty-five years. We have two adult children and we love pets. We usually have a large collie who is always my best friend and travels with me on weekends for errands, etc. Our current collie is "Flash." We have rescue cats as well.

Education

Legal Education
- University of Wisconsin, Madison, Wisconsin
  J.D.
  Honors: cum laude
  Honors: West Publishing Company Award
  Honors: Abe Sigman Award
  Law Review: University of Wisconsin Law Review, Editor-in-Chief, 1976 - 1978
Non Legal Education
- University of Wisconsin - Madison, Madison, Wisconsin, 1975
  B.A.
  Honors: With Distinction
  Major: Journalism

Current Employment Position(s)

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Sole Practitioner
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Past Positions

Petrie & Stocking S.C., Partner, 1997 - 2003
Godfrey & Kahn S.C., Associate and Partner, 1978 - 1997

References

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US Bank
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PyraMax Bank
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Classes and Seminars

Legal Ethics, Petrie & Stocking S.C., 1997 - 1999
Public Record Law, Wisconsin State Bar, 2000
Ethics, Public Meetings, and Record Law, Continuing Legal Education Seminars

Pro Bono Activities

Multiple Cases Ongoing

Representative Clients

Recording Industry Association of America

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Atari Corp.
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Wisconsin Souvenir Milk caps, Inc.
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PyraMax Bank
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ECTO Productions, Inc.
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Emerald Professional Staffing, Inc.
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Arrow Design Corp.
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Representative Cases

South Milwaukee Savings Bank v. Barrett
- Citation: 234 Wis.2d 733, 611 N.W.2d 448
- Court: Wi. Supreme Ct.
- Year: 2000
A&M Records v. A.L.W. Ltd.
- Citation: 855 F.2d 368
- Court: 7th Cir. Ct. App.
- Year: 1988

Published Works

Articles

A Guide for Wisconsin Nonprofit Organizations, Wisconsin Bar, 1998

Bar Admissions

Wisconsin, 1978
U.S. District Court Eastern District of Wisconsin, 1978
U.S. District Court Western District of Wisconsin, 1978
U.S. Court of Appeals 7th Circuit

Other Affiliations

Wisconsin Lawyers for Voters Rights, - 1996 (Co-Founder)
American Civil Liberties Union
The Milwaukee Bar Association
The Walworth County Bar Association

Fraternities and Sororities

Phi Delta Phi

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Contact

Elkhorn, WI

6 South Church Street
Elkhorn, WI 53121

Directions

Phone: 800-837-6956

Fax: 262-723-5141

Email: Send a message

Website: https://www.sostarichlaw.com

Credit Cards Accepted

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Mark E. Sostarich - Elkhorn, WI