About
Matthew H. O’Neill is a Montana attorney whose practice focuses on real estate transactions, estate planning, and probate matters. Based in Polson, he has built a career serving individuals, families, and property owners with careful legal guidance, practical drafting, and steady support through important financial and personal decisions.
Mr. Matthew earned his Bachelor of Arts from the University of Montana in 1979 and his Juris Doctor from the University of Montana Law School in 1982. He was admitted to practice in Montana in 1982 and is also admitted before the U.S. District Court for the District of Montana. Throughout his legal career, he has maintained a focused practice in Polson, Montana. His work in real estate law includes assisting clients with transactions, reviewing documents, addressing title-related concerns, and helping parties understand the legal responsibilities that arise when buying, selling, financing, or transferring property.
In estate planning, Mr. Matthew helps clients prepare for the future through thoughtful legal documents and clear explanations. His guidance may support wills, planning decisions, asset transfers, and related arrangements. He works to make complex issues easier to understand so clients can make informed choices with confidence. His probate practice supports families and personal representatives during the administration of estates. He assists with legal filings, court requirements, property transfers, creditor issues, and the orderly resolution of estate matters. His experience helps clients navigate procedures that can feel unfamiliar, especially during difficult transitions.
Clients benefit from Matthew H. O’Neill’s long-standing knowledge of Montana law and his commitment to practical, detail-oriented service. He approaches legal matters with professionalism and care, focusing on accurate documentation, timely communication, and solutions tailored to each client’s circumstances, goals, financial concerns, and responsibilities, with clear explanations and consistent organization. He has helped people protect property interests, organize estate plans, and resolve probate issues with reliable legal counsel. His career reflects a consistent dedication to focused practice areas, careful client service, and the legal needs of individuals and families throughout the Polson community.
Law Office Affiliations
- Owner, O’Neill Law Office, PLLC
- Member, Montana Bar Association
Licensed State
- Montana
Education
- University of Montana Law School
Juris Doctor (JD) - University of Montana
Bachelor of Arts
Awards & Badges

- Contracts & Agreements
- Corporate & Incorporation
- Probate
- Trusts
- Wills & Living Wills
- Commercial Real Estate
- Construction & Development
- Residential Real Estate
- Litigation




