Maria Mengarelli
Maria understands a lawsuit's impact on a client and the nervousness and uncertainty of what it brings. She approaches each case calmly and clearly, laying out the road ahead.
- Educator with AmeriCorps Jumpstart
- Studied South African Bantu language

Maria Mengarelli
Attorney in Edwardsville, IL
Maria understands a lawsuit's impact on a client and the nervousness and uncertainty of what it brings. She approaches each case calmly and clearly, laying out the road ahead. She believes in honesty, not hiding the difficulties, and finds truth in the adage that there are three people you should never lie to: your doctor, priest, or lawyer.
Maria Mengarelli, an Associate attorney in our Edwardsville office, joined the firm in 2021. Serving on several practice group teams, Maria had an early opportunity in her career to try her first solo case. Thankful for Heyl Royster's vast wealth of experienced, bright attorneys willing to share their knowledge and provide case law direction, Maria successfully obtained a favorable ruling. She recognized that she had found a firm that would allow her to represent her clients in the best way possible as she furthers her tenure in the legal practice.
A graduate of Southern Illinois University School of Law, Maria was a member of the trial team competing in intramural mock trial competitions. She attributes this experience to help her develop a firm foundation of the ins and outs of trials, witness testimony, and the rules of evidence. Additionally, while in law school, Maria researched common law versus trial law in Kenya and South Africa, allowing her a unique opportunity to bring her Linguistics undergraduate degree into her law school studies.
Dedicated to the community, Maria has taught for AmeriCorps Jumpstart, partnered with Meals on Wheels, and participated in Habitat for Humanity. Moving to Edwardsville during the COVID lockdowns, Maria continues to explore the area and is looking forward to becoming active in her new community.
Practices
Credentials
Education
J.D., Southern Illinois University School of Law
B.A., University of Missouri, Linguistics
Licensure(s) and Admission(s)
State Courts of Illinois
State Courts of Missouri
United States District Court for the Southern District of Illinois
Professional Affiliations
Alton/Wood River Bar Association, Treasurer
Madison County Bar Association
Women’s Bar Association of Greater St. Louis
Women’s Bar Association of Illinois
Community Involvement
Habitat for Humanity
Christmas in April Participant
Meals on Wheels – Granite City
School Sisters of Notre Dame High School Mock Trial Team
Results
Received a favorable decision in her first case with Judge Chapman, citing that "defendant's attorney refuted the plaintiff's assertion with what amounted to be a painstaking account that proved [defendant's] payments to Plaintiff … to the penny."
Updates
- Heyl Royster Supports United Way’s Power of the Purse