The Law Office of James Perez
“He expertly guided me through my visa process from start to finish with professionalism and personalized attention.”
Best Immigration Lawyers in Diamond Bar, CA
15 firms listed · 5 in Diamond Bar · 2 open 24/7 · 4 open weekends · 10 rated 4.5+
Data verified October 21, 2026
Desiree Dominguez Immigration Law Office
“Immigration process can be a bumpy ride so arm Yourself with patience and leave it all to ms Desiree and her team.”
Haven & King Law Firm
Immigration Services
“Great immigration law firm really good service”
Law Office of Peiwen C. Liu
“She responded to every email and phone call with grace, she was courteous and timely with every response.”
Hart Immigration
“Every step of the process is well researched by her, and she will find the best way to help you achieve your goals.”
These 15 firms listed for Diamond Bar, CA handle immigration matters for people and employers. What each states about case types, accreditation and languages spoken comes from its own website; ratings and quotes come from public reviews.
Area overview: Diamond Bar, CA
5 of the 15 firms we list are based in Diamond Bar; the other 10 serve Diamond Bar from towns including Fullerton (10 mi), West Covina (7 mi) and Pomona (5 mi). The firms on this page are rated from 4.0 to 5.0 across 987 reviews; 7 have 50 or more reviews and 10 are rated 4.5 or higher. When clients rate these firms on specific qualities, they most often praise professionalism (93%), responsiveness (80%) and quality (77%). 2 are open around the clock; 4 are open on Saturdays and 2 on Sundays. The practice areas the firms on this page list most often on their websites are asylum (2), civil litigation (2), criminal law (2) and family law (2). 1 shows a license on its website and 2 have a BBB rating of A or A+. Domain records put 12 websites of the firms on this page at ten or more years old; the oldest dates from 2002. 2 offer urgent consultations and 7 offer a free initial consultation. We count these figures across the firms on this page; distances are straight-line, and hours and prices change, so confirm the details with the firm before you book a consultation.
Can I book a consultation online with immigration firms listed for Diamond Bar?
2 of the 15 immigration firms here take bookings on their own site. It suits this work, since a first consultation is usually a paid assessment of your options rather than a sales call. Check what the slot costs and how long it runs before you reserve one.
Law Offices of Fernando J Bernheim
“From the consultation, to everything in between, the entire team were all very professional and respectful towards every aspect of the process and there was great communication throughout the entire process.”
The Law Firm of Oscar A. Ischiu
“Excellent, a great person advised me and supported me at the right time.”
Georges Meleka Law Offices
“Very helpful and instant reply to all questions from him and his staff especially Katherine.”
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Neil Panchal Law
“He was available for questions and was very on hands with my case not like other attorneys were you always get there assistant and told they'll call you back.”
Law Offices of Omar Gastelum & Associates
“I trust so very few in life anymore, what a pleasure to have peace of mind in any of my trying times to know I am getting the best representation I could hope for.”
D'Andrea Law Corporation
“Attorney Susu D'Andrea exhibited a profound understanding of the legal intricacies involved and provided me with valuable guidance every step of the way.”
Zamora Services #1 Taxes & Immigration
“Since I have done my taxes there, they do them efficiently and quickly...”
GK Legal Group
“Therefore, I would recommend him highly to anyone who is browsing for an excellent attorney who can help file a personal injury claim.”
Law Offices of Eugene M. Palacios
“ Also appreciative of how thorough you and your team was throughout the process.”
Why these companies made our list
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