Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with 18 U.S.C Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, I, Min J. Kim, President and Chief Executive Officer of OP Bancorp (the “registrant”), hereby certifies that, to the best of knowledge:

(1)The registrant’s Quarterly Report on Form 10-Q for the period ended March 31, 2024 to which this Certification is attached as Exhibit 32.1 (the “Report”), fully complies with the requirements of Section 13(a) or Section 15(d) of the Securities Exchange Act of 1934, as amended; and

(2)The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the registrant.

Date: May 15, 2024	By:	/s/ MIN J. KIM
		Min J. Kim
		President and Chief Executive Officer (Principal Executive Officer)