1ST CONSTITUTION BANCORP - 10-K filing on 2006-03-10

Exhibit 23.1 – Grant Thornton LLP

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We have issued our report dated March 8, 2006, accompanying the consolidated financial statements in the Annual Report of 1^st Constitution Bancorp on Form 10-K for the year ended December 31, 2005. We hereby consent to the incorporation by reference of said report in the Registration Statement of 1^st Constitution Bancorp on Form S-8 (file No. 333-98177, effective August 15, 2002).

/s/ GRANT THORNTON LLP

Philadelphia, Pennsylvania
March 8, 2006