First Northern Community Bancorp (FNRN) 10-K 2022 FY Annual report

EXHIBIT 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the Registration Statements on Form S-8 (No. 333-37874, No. 333-136977, No. 333-207951, and 333-262318) of First Northern Community Bancorp (the “Company”), of our report dated March 10, 2023, relating to the consolidated financial statements of the Company, appearing in this Annual Report on Form 10-K of the Company for the year ended December 31, 2022.

/s/ MOSS ADAMS LLP

Sacramento, California

March 10, 2023