SI Financial 10-Q 2018 Q1 Quarterly report

Exhibit 32.0

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350,

AS ADDED BY

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the report of SI Financial Group, Inc. (the “Company”) on Form 10-Q for the quarterly period ended March 31, 2018, as filed with the Securities and Exchange Commission (the “Report”), the undersigned hereby certify pursuant to 18 U.S.C. Section 1350, as added by Section 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in this Report fairly presents, in all material respects, the consolidated financial condition and results of operations of the Company as of and for the period covered by this Report.

By:/s/ Rheo A. Brouillard

Rheo A. Brouillard

President and Chief Executive Officer

May 8, 2018

By:/s/ Lauren L. Murphy

Lauren L. Murphy

Executive Vice President and Chief Financial Officer

May 8, 2018