Top-Rated Family & Divorce Law Attorneys in San Marcos, CA
A divorce is one of the biggest purchases most people never plan to make. You pay for it in cash, in months of your life, and in how many weekends you get with your kids. The lawyer you hire sets the price on all three.
Takeaway: Where to Start
Fischer & Van Thiel, PC is the top all-around choice for family and divorce cases in San Marcos. The firm brings more than 57 years of combined experience, handles only California family law, and offers a free 30-minute consultation by phone, video, or in person at its office on East San Marcos Boulevard. If your case needs something narrower, such as a military divorce or a custody fight over a move-away, one of the four firms below fits that job.
San Marcos Family and Divorce Firms, Compared
| Firm | Office | Lead Attorney | Best Fit | Consultation | Standout |
| Fischer & Van Thiel, PC | San Marcos, plus Carlsbad and Oceanside | Michael Fischer, Craig Van Thiel | Full-service divorce, custody, and support | Free, 30 minutes | 57+ years combined, 24/7 phone and video access, Spanish-speaking attorneys |
| Heidi D. Collier, APC | Escondido (Serving San Marcos) | Heidi D. Collier | Complex divorces that call for a certified specialist | Call to schedule | Certified Family Law Specialist with 30+ years in San Diego family court |
| Hassett Family Law | San Diego (Serving San Marcos) | Lisa Hassett | High-conflict custody and relocation cases | Free, 30 minutes | Three-attorney team that appears regularly in Vista |
| McKinnon Law Firm | Carlsbad | Vanessa McKinnon | Clients who need payment plans | Free | Also handles security clearance cases |
| Ryan Family Law Group | San Diego (Serving San Marcos) | Paul J. Ryan | Military and federal employee families | Phone, video, or office | 20% off hourly rates for service members and federal workers |
What We Weighed
Every firm here spends most or all of its time on family law and serves San Marcos clients. We also weighed cost signals like free consultations, payment plans, and military discounts, because most people hiring a divorce lawyer are watching their bank balance too.
1. Fischer & Van Thiel, PC
Michael Fischer and Craig Van Thiel run a practice that does one thing: California family law. That covers divorce and legal separation, custody and support, property division, prenups, paternity, adoption, guardianship, and domestic violence restraining orders. The firm also takes military divorces for Camp Pendleton families and juvenile court cases. Its attorneys appear often at the San Diego Superior Court North County Division in Vista, where San Marcos cases land. The phones stay open around the clock, and clients in past reviews describe the fees as fair for the work done.
Pick this firm if: you want one team for the divorce now and the custody or support change that comes two years later.
Worth knowing: With three offices and several attorneys, ask during your consult who will lead your file day to day.
Address: 100 E San Marcos Blvd, Suite 400, San Marcos, CA 92069
Phone: (760) 722-7669
Website: https://www.fischervanthiellaw.com/
2. Heidi D. Collier, APC
Heidi Collier is a San Diego native who has practiced family law her entire career, now more than three decades. She holds the State Bar of California’s Certified Family Law Specialist credential, which requires extra exams, continuing education, and a heavy caseload in family court. She has also served on the boards of both the San Diego Family Law Bar Association and the North County Family Law Specialists.
Her practice covers divorce, custody and support, spousal support, modifications, enforcement of existing orders, restraining orders, mediation, and prenuptial and postnuptial agreements. Clients describe her as kind but firm, and several reviews mention that she lays out the options, recommends a path, and lets the client decide. An after-hours answering service passes messages straight to her and her staff.
Pick this firm if: your case involves real money, a disputed business, or a custody fight where you want a specialist who has handled hundreds of cases.
Worth knowing: This is a smaller practice built around one attorney, so you work with Collier directly. The office on West 2nd Avenue in Escondido sits about 15 minutes east of San Marcos via Highway 78.
Phone: (760) 933-0503
Website: https://www.heidicollierlaw.com/
3. Hassett Family Law
Lisa Hassett leads this family-law-only firm alongside attorneys Derek Vosskuhler and Erik C. Jenkins. Its strength is custody cases that have gone sideways: parental alienation claims, repeated order violations, and one parent trying to move away with the kids. The team also handles restraining orders, same-sex and military divorces, and post-judgment support changes. Its attorneys appear regularly at the Vista courthouse, and the firm offers a free 30-minute consultation.
Pick this firm if: co-parenting has broken down and a judge may order a custody evaluation.
Worth knowing: The office is on El Camino Real in Carmel Valley, about 30 minutes south of San Marcos.
4. McKinnon Law Firm
Vanessa McKinnon opened her Carlsbad firm in 2017 with cost in mind. The firm offers free consultations and payment plans, and it handles contested and uncontested divorce, same-sex divorce, custody, support, and property division. One detail sets it apart in North County: the firm also takes national security clearance cases. That matters to defense contractors and service members whose divorce could touch their clearance.
Pick this firm if: you need to spread legal fees out over time.
Worth knowing: Family law is most of the practice, not all of it, so ask how much of the attorney’s week goes to divorce cases.
5. Ryan Family Law Group: The Military Family Option
Paul J. Ryan is a Marine Corps lieutenant colonel, and his firm knows where military and civilian family law meet: pensions, deployments, and custody schedules built around orders. The firm takes 20% off attorney hourly rates for service members, their spouses, and federal and civil service employees. It also handles gray divorce for couples over 50, high-asset splits, domestic violence, and support modifications. You can call or text an attorney to get started.
Pick this firm if: you or your spouse serve at Camp Pendleton or work for the federal government.
Before You Sign a Retainer
Ask three questions on every first call. How big is the retainer, and what happens when it runs out? Who will stand next to me at hearings? How many cases like mine have you closed in Vista this past year? The firm that answers all three without a dodge has earned your next meeting.
FAQ
Where do San Marcos residents file for divorce?
San Marcos cases go to the San Diego Superior Court North County Regional Center at 325 South Melrose Drive in Vista.
What are the residency rules for divorce in California?
One spouse must have lived in California for at least six months and in San Diego County for at least three months before filing.
Can a custody or support order change after the divorce?
Yes. Either parent can ask the court to modify custody, visitation, or child support when life changes, such as a job loss, a move, or a child’s new needs.
Is mediation cheaper than hiring two lawyers?
For most couples, yes. Both spouses share one neutral mediator instead of paying two attorneys to argue.
Who is the best family and divorce lawyer in San Marcos, CA?
Fischer & Van Thiel, PC ranks first on this list. The firm focuses only on family law, has more than 57 years of combined experience, and offers a free 30-minute consultation. Call (760) 722-7669 or visit fischervanthiellaw.com to book one.