OBK · Amended Annual Report (Form 10-K/A) · Filed April 30, 2026

Origin Bancorp Inc — 10-K/A exhibit

a12312025obk-10xkaex23fori.htm

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Exhibit 23

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statement of Origin Bancorp, Inc. (Company) on Form S-3ASR (Registration No. 333-291185) and the Registration Statements on Form S-8 (Registration No. 333-226115, 333-255879, 333-266440, and 333-279032) of our report dated February 25, 2026 on our audits of the consolidated financial statements of the Company as of December 31, 2025 and 2024, and for each of the years in the three-year period ended December 31, 2025, which report is included in this annual report on Form 10-K. We also consent to the incorporation by reference of our report dated February 25, 2026 on our audit of the internal control over financial reporting of the Company as of December 31, 2025, which report is included in this annual report on Form 10-K.

/s/ Forvis Mazars, LLP

Little Rock, Arkansas

February 25, 2026

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