Katie E. O’Leary

Katie E. O’Leary is an attorney at O’Leary Law Office in Sioux Falls whose client-centered practice focuses on personal injury, family law, criminal defense, and civil litigation. She represents individuals facing disputes, injuries, criminal charges, and family-related legal issues and brings prior prosecutorial experience to private practice. Her work involves evaluating facts, explaining legal options, preparing cases, negotiating resolutions, and advocating in court when a matter cannot be resolved informally.

Katie earned both a BA and MA in English from the University of South Dakota and earned her JD from Hamline University School of Law. She also taught writing at Western Kentucky University and South Dakota State University. Her background in English and teaching supports careful legal writing, organization, and communication, while her law degree provides the foundation for litigation strategy, client counseling, and courtroom advocacy across several practice areas.

Katie began practicing law in 2021 and prosecuted state and federal crimes throughout South Dakota. In 2024, she joined her father in private practice at O’Leary Law Office. Her prosecutorial work gave her experience with criminal procedure, evidence, charging decisions, hearings, and courtroom practice. She now applies that experience to criminal defense while also representing clients in personal injury, family law, and civil litigation matters that require careful preparation and persuasive advocacy.

Katie E. O’Leary serves clients in the Sioux Falls community with a practice that combines courtroom experience, writing skills, and direct client communication. Her transition from prosecution to private practice gives her perspective on how criminal cases are evaluated and presented, while her broader civil work allows her to assist with injuries and family disputes. She helps clients understand procedures, weigh options, and prepare for negotiation, hearings, or trial with a clear strategy.

Law Office Affiliations

• Attorney, O’Leary Law Office
• Member, State Bar of South Dakota

Licensed State

• South Dakota

Education

• Hamline University School of Law
  Juris Doctor (JD)
• University of South Dakota
  Master of Arts (MA)
• University of South Dakota
  Bachelor of Arts (BA)

Awards & Badges