Home Our Team Amelia J. Mattis

About Attorney Amelia J. Mattis

Amelia J. Mattis is an owner in the law firm of Mattis Law, A.P.C.

Ms. Mattis has represented clients in a variety of complex family law issues and has successfully litigated multi-day trials on behalf of the firm. She has prevailed in court regarding child custody move-away and relocation issues, defeated unwarranted requests for restraining orders, obtained court-ordered domestic violence restraining orders (DVROS) for clients who needed protection, prevailed in a variety of child custody requests and in opposition to child custody order modifications.

She is adept at the DissoMaster™ program the family courts use to calculate support and is able to work with clients to give them a projection of what support orders they can expect to receive or pay, as well as how to successfully apply for a reduction or increase in support. She has prevailed in evidence hearings involving issues to terminate spousal support. Amelia is skilled in "discovery" issues (such as interrogatories and depositions), which has successfully allowed significant evidence to be received by the Court.

Attorney Mattis enjoys working closely with clients to help them communicate effectively to the Court the issues that are important to them. She understands the process can be overwhelming and confusing and ensures clients understand their rights and options. She is sensitive to the delicate nature of client concerns and has experience with cases where domestic violence or child abuse is alleged, as well as obtaining child welfare services (CWS) and police reports.

Amelia graduated law school cum laude and was a staff member and editor on her school's law review. She was awarded several scholastic honors from her law school. Prior to that, Amelia graduated summa cum laude from the University of San Diego. She was a member of the Communications Studies Honor Roll.


University of San Diego

Thomas Jefferson School of Law, Juris Doctor


  • Thomas Jefferson School of Law Family Law Clinic
  • AmeriCorps Fellow, Catholic Charities Migration & Refugee Services
  • Casa Cornelia Law Center
  • Editor, Thomas Jefferson School of Law Review
  • Law Students for Reproductive Justice
  • International Law Society
  • Lambda Pi Eta
  • USDtv
  • Legal Aid Society Domestic Violence Clinic

Awards and Memberships

Marquis Who’s Who

Included in the Marquis Who’s Who in America

American Academy of Attorneys

Designated Top 40 Under 40 in California by the American Academy of Attorneys 2018

10 Best Female Family Law Attorney

10 Best Female Family Law Attorney 2020


Favorite Family Law Attorney in the 2020 San Diego's Best Union-Tribune Readers Poll

National Alliance of Women in Law

Top 40 Young Lawyer with the National Alliance of Women in Law

American Association of Attorney Advocates

American Association of Attorney Advocates

Attorney And Practice Magazine

Selected as Top 10 Family Law Attorney by Attorney And Practice Magazine

Super Lawyers

Selected as a2023 San Diego Super Lawyers Rising Star

American Institute of Legal Professionals

American Institute of Legal Professionals - 2022 Lawyer of the Year Membership


Amelia Mattis on the cover of Discover MagazineAmelia J. Mattis is proud to have been featured in a digital La Jolla edition of Discover Magazines, where she discusses the origins of her law firm as well as the ways in which her practice brings hope, stability, and security to families in and around San Diego.

(858) 328-4400