Exhibit 32.1
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
In connection with the Quarterly Report of Unitil Corporation (the “Company”) on Form 10-Q for the period ending June 30, 2012 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), each of the undersigned Robert G. Schoenberger, Chief Executive Officer and President, Mark H. Collin, Chief Financial Officer and Laurence M. Brock, Chief Accounting Officer, certifies, to the best knowledge and belief of the signatory, pursuant to 18 U.S.C. section 1350, as adopted pursuant to 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 the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. |
Signature | Capacity | Date | ||||
/s/ Robert G. Schoenberger | ||||||
| Robert G. Schoenberger | Chief Executive Officer and President | July 25, 2012 | ||||
/s/ Mark H. Collin | ||||||
| Mark H. Collin | Chief Financial Officer | July 25, 2012 | ||||
/s/ Laurence M. Brock | ||||||
| Laurence M. Brock | Chief Accounting Officer | July 25, 2012 | ||||