United States securities and exchange commission logo January 27, 2021 Yee Phong Thian Chairman, President and Chief Executive Officer RBB Bancorp 1055 Wilshire Blvd. 12th Floor Los Angeles, CA 90017 Re: RBB Bancorp Registration Statement on Form S-3 Filed January 21, 2021 File No. 333-252299 Dear Mr. Thian: This is to advise you that we have not reviewed and will not review your registration statement. Please refer to Rules 460 and 461 regarding requests for acceleration. We remind you that the company and its management are responsible for the accuracy and adequacy of their disclosures, notwithstanding any review, comments, action or absence of action by the staff. Please contact Eric Envall at (202) 551-3234 with any questions. Sincerely, Division of Corporation Finance Office of Finance