John M. Kelly


The most accomplished people in any field have a natural ability to attract productive and enduring professional relationships. Jack Kelly's widespread success in the legal world is no accident because he directs his personal attention to every client, no matter how big or how small. His ability to establish and nurture enduring business relationships has made him a force on the legal landscape throughout Wisconsin.


Jack Kelly is an Oshkosh native with 40 years of experience creatively and expertly advocating for his clients. While his practice is wide-ranging, from serious personal injury suits to complex business transactions to multi-party litigation and beyond, he consistently achieves results that exceed his clients' expectations by providing the highest quality legal services to each matter he handles. Jack's extensive legal training, experience and wealth of knowledge, combined with his unmatched tenacity, have made him one of Wisconsin's leading attorneys. He is rightly recognized by the Wisconsin legal community for his success, integrity, and highest level of client representation. He is a past President of the Winnebago County Bar Association and was selected to give introductory remarks before a special appearance of the Wisconsin Supreme Court in Winnebago County in 2008.


Jack Kelly fights tirelessly for his clients and has the skills, confidence, and experience necessary to earn first-rate results in a wide array of practice areas. He graduated from the University of Wisconsin-Madison in 1971 with a B.A. in Economics, received his J.D. from Georgetown University Law Center in 1974, and attended the Harvard School of Business Administration in 1976 and 1977. An avid outdoorsman, he lives on Lake Winnebago with his wife of over 30 years. He proudly brings his commitment to excellence to his work for his clients throughout the State of Wisconsin.


  • Georgetown University Law Center, Washington, District of Columbia, 1974 J.D.
  • University of Wisconsin, Madison, Wisconsin, 1971 A.B.
  • Major: Economics
  • Harvard School of Business Administration

Bar Admissions

  • Wisconsin, 1974
  • District of Columbia, 1975
  • U.S. District Court for the Eastern District of Wisconsin, 1977
  • U.S. District Court for the Western District of Wisconsin, 1977
  • U.S. District Court for the District of Columbia, 1977
  • U.S. Court of Appeals for the District of Columbia Circuit, 1976
  • U.S. Court of Appeals for the 7th Circuit, 1977
  • U.S. Court of Federal Claims, 1975
  • U.S. Tax Court, 1975

Professional Association and Memberships

  • Dempsey, Williamson, Kelly & Hertel, LLP Managing Partner, 2003-2011
  • Winnebago County Bar Association President, 1996-1997
  • District of Columbia Bar Member
  • State Bar of Wisconsin Member
  • Association of Trial Lawyers of America Member
  • Wisconsin Academy of Trial Lawyers Member


  • Phi Kappa Phi
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