Exhibit 32.1 SECTION 906 CERTIFICATIONS SARBANES-OXLEY ACT OF 2002 Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (Subsections (a) and (b) of Section 1350, Chapter 63 of Title 18, United States Code), each of the undersigned officers of Westbank Corporation (the "Corporation") does hereby certify to such officer's knowledge that: The Quarterly Report on Form 10-Q for the quarter ended March 31, 2005 of the Corporation fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and information contained in the Form 10-Q fairly presents, in all material respects, the financial condition and results of operations of the Corporation. Date: May 6, 2005 /s/ Donald R. Chase ------------------------------------- Donald R. Chase President and Chief Executive Officer