Nancy Encarnacion Mass

Nancy Mass is a Certified Specialist in Family Law and a Fellow in the American Academy of Matrimonial Lawyers. She has practiced family law exclusively since 2005.

Nancy handles all aspects of high-asset dissolutions, including those involving complex financial issues, property characterization, business valuation, child custody, child support, and spousal support, from the inception of a case through settlement or trial. Nancy also prepares prenuptial and postnuptial agreements and works with clients as a consulting attorney, as needed. She represents clients in domestic violence actions, as well. Nancy is a trained mediator and is also a Collaborative Divorce Attorney.

Prior to focusing exclusively on family law, Nancy’s practice focused on civil litigation, which included defending businesses in tort and employment litigation actions.

Nancy graduated from the University of California, College of the Law, San Francisco (formerly University of California, Hastings College of the Law) in 2002. Nancy graduated cum laude from University of California at Los Angeles, having attained a Bachelor of Arts degree majoring in English and French.

Nancy is fluent in Spanish and French.

Education

• University of California, College of the Law, San Francisco (formerly University of California, Hastings College of the Law)
• University of California at Los Angeles. Graduated 1998
• Bachelor of Arts degree majoring in English and French.

Awards & Accolades>

• Selected as a Northern California Super Lawyer for 2017 through 2023 by Super Lawyers Magazine.
• Selected as a Northern California Rising Star for 2011 through 2016 by Super Lawyers Magazine.
• Named as one of the top attorneys in the 2024 and 2025 Lawdragon 500 Leading Family Lawyers, as surveyed by Lawdragon, Inc. and published in The Family 500.

Associations & Membership

• Association of Certified Family Law Specialists
• American Academy of Matrimonial Lawyers, Northern California Chapter
• San Mateo County Bar Association
• Santa Clara County Bar Association
• Bar Association of San Francisco
• Diversity Committee of the San Mateo County Bar Association, 2017-present