Mark S. Hilario

Mark Hilario - Mark Hilario

Mark S. Hilario | Founder, Hilario Law Firm

Billings Attorney Mark S. Hilario established Hilario Law Firm in 1998 with the goal to provide quality legal representation to individuals struggling with complex legal matters involving bankruptcy, divorce, estate planning, probate, business and real estate.

Before founding his solo law firm in Billings, our lawyer attended the University of Montana School of Law in Missoula, Montana, where he earned his juris doctorate in 1998. He is a member of the State Bar of Montana, American Bar Association, Montana Trial lawyers Association and Yellowstone Area Bar Association.
"After several years as a partner in small Montana law firm, I opened a solo practice, known as Hilario Law Firm. Throughout my career I have always dedicated myself to providing quality legal representation for individuals, families and small businesses. I strive to provide commonsense advice representation that serves the practical needs of my clients. Over the years I have developed a wide range of expertise. A seasoned attorney once told me that hiring a good attorney is a good investment. If you are in need of legal assistance, please give Hilario Law Firm the opportunity to assist you."


Federal law allows consumers and businesses to file for bankruptcy when they are unable to service their debts. When appropriate, I help clients get relief from medical bills, credit card debt, mortgage difficulties and other stressful financial problems through Chapter 7 and Chapter 13 bankruptcy filings.

Divorce & Family Law

When your family is at a crossroads, you want to make smart decisions that are going to protect your rights today and help you build a better future. An experienced family law attorney can help you explore your options and find solutions tailored to your needs.

Estate Planning & Probate

My firm helps families obtain the wills, trusts and powers of attorney they need to make sure their loved ones will be provided for and their assets protected when they pass away or become incapacitated. I also provide guidance to families as they go through the process of probate.

Business & Real Estate

I provide reliable legal advice regarding business and real estate transactions and disputes. I serve business and property owners in matters involving business formation, partnership issues, commercial litigation, and the buying, selling and leasing of residential, commercial and agricultural real estate.


University of Montana School of Law, Missoula, Montana
J.D. - 1998
Montana State University, Billings, Montana
B.A. - 1993
Major: Communication Studies
University of Montana
M.A. - 1995
Major: Communication
Professional Associations and Memberships

State Bar of Montana, Member
American Bar Association, Member
Montana Trial lawyers Association, Member
Yellowstone Area Bar Association, Board Member, 2006 - Present

Areas of Practice

Bankruptcy, Chapter 7, Chapter 13
Criminal Law
Estate Planning
Personal Injury -- Plaintiff
Bar Admissions