Mark Meierhenry is a nationally recognized trial attorney. Mark was born and raised in Gregory, SD . He received his Bachelor’s Degree from the University of South Dakota in 1966 and his J.D. in 1970, also from USD. He served as the Director of South Dakota Legal Services and as an adjunct professor of Trial Practice and Indian Law before becoming South Dakota’s Attorney General in 1979. While serving as Attorney General Mr. Meierhenry argued before the United States Supreme Court on behalf of South Dakota eight times. He held the position until 1986. In 1987 he joined the Danforth Law Firm in Sioux Falls. Since that time Mr. Meierhenry has become a leading civil trial attorney representing clients in all areas. Mr. Meierhenry is also a co-author of an acclaimed series of children’s books.


University of South Dakota – 1966

Juris Doctor
University of South Dakota – 1970

Admitted to Practice

South Dakota
North Dakota
U.S. District Court, South Dakota
U.S. District Court, Nebraska
U.S. Court of Appeals, Eighth Circuit
U.S. Supreme Court


South Dakota Trial Lawyers Association
Board of Directors, 1974-78
Managing President, 2001-02
American Board of Trial Advocates (ABOTA)
SD President, 2002-03
2nd Circuit Bar Association
State Bar of South Dakota
National Association of Attorneys General
American Association for Justice (Formerly ATLA)
Fellow, American College of Trial Lawyers


South Dakota Trial Lawyer of the Year, 1995
Martindale-Hubbell Law Directory – A.V. Rated


South Dakota Trial Handbook for Lawyers (1994)
The Mystery of the Round Rocks (2007)
The Mystery of the Tree Rings (2008)
The Mystery of the Maize (2010)

Representative Cases

United States Supreme Court

2001-Lopez v. Davis, 531 US 230 (2001)
1987-Western Airlines vs. Board of Equalization, 480 U.S. 123 (1987)
1984-Solem vs. Stumes, 465 U.S. 638 (1984)
1984-Solem vs. Bartlett, 465 U.S. 463 (1984)
1983-Solem vs. Helm, 463 U.S. 277 (1983)
1983-South Dakota vs. Neville, 459 U.S. 553 (1983)
1981-St.Martins Academy vs. South Dakota, 451 U.S. 772 (1981)
1973-Keeble vs. United States, 412 U.S. 205 (1973)