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Please contact us locally at 714-544-6622 to schedule a consultation. Our firm is located just one block from Fashion Island.

Firm Information

Law Offices of Andrea L. Mersel

3090 Bristol Street, Suite 120

Costa Mesa, CA 92626

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Phone: 714-544-6622

Fax: 714-594-4047

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Lisa C. Thornton





Costa Mesa, CA




Lisa has been a family law attorney since 2016. Before moving to Orange County, she practiced family law in Monterey, California. She earned her law degree from Trinity Law School where she was awarded the American Jurisprudence Award in Criminal Procedure. She was admitted to the California State Bar in 2016, after spending a summer studying Human Rights Law at the Institute for International Human Rights in Strasbourg, France. Lisa is a member of the Orange, Riverside, and Monterey County Bar Associations and was President of Trinity's Federalist Society.

Lisa was a CASA (Court Appointed Special Advocate for foster children) and plans to continue her advocacy for foster youth. She is a strong advocate for her clients, and ever mindful of their best interests, including protecting their assets, and compassion for their children. "I have always had a desire to help people when they need it the most. I believe that is where the Law Offices of Andrea L. Mersel has its focus."

Lisa thrived as a Manager of Programs and Development at the Urban Land Institute (ULI) where she managed multiple professional committees made up of land-use attorneys, architects, and land developers, to advance directives of the company's mission which is to provide leadership in the responsible use of land and creating and sustaining thriving communities worldwide.

Prior to her work at ULI, she was a Director at United Way where she directed committees to envision a community where all individuals and families achieve their human potential through education, financial stability, and healthy lives.

Lisa has 20 years of experience in planning and logistics, and has volunteered in community activities involving preserving the family unit and community. "Clients are experiencing a loss and it is my job to assist them in letting go of the past and moving forward toward a positive future. Encouraging and advocating for them through their divorce and custody issues and designing strategies for them to come out positive on the other side is my mission."

Our Attorneys

The Law Offices of Andrea L. Mersel provides representation for individuals and families in family law for individuals and families in the California cities of Tustin, Irvine, Newport Beach, Huntington Beach, Lake Forest, Rancho Santa Margarita, Mission Viejo, Corona Del Mar, Anaheim, Fullerton, Placentia, Yorba Linda, Orange, Santa Ana, Fountain Valley, Laguna Beach, and in other areas including Orange County, San Bernardino County, Riverside County and Los Angeles County.


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