Exhibit 99.1

Using a black ink pen, mark your votes with an X as shown in this example. Please do not write outside the designated areas. X 01Z4IC 1 U P X + Special Meeting Proxy Card . Authorized Signatures — This section must be completed for your vote to be counted. — Date and Sign Below C Please sign this proxy exactly as your name appears on the books of the Company. Joint owners should each sign personally. Trustees and other fiduciaries should indicate the capacity in which they sign, and where more than one name appears, a majority must sign. If a corporation, the signature should be that of an authorized officer who should state his or her title. If a partnership, please sign in partnership name by general partner or other authorized person. Signature 1 — Please keep signature within the box. Signature 2 — Please keep signature within the box. Date (mm/dd/yyyy) — Please print date below. + Change of Address — Please print your new address below. Comments — Please print your comments below. B Non-Voting Items A Proposals — The Board of Directors recommends a vote FOR proposals 1, 2 and 3 below. For Against Abstain 1. To consider and vote upon a proposal to approve the Agreement and Plan of Merger, dated as of November 3, 2014, by and between Berkshire Hills Bancorp, Inc. and Hampden Bancorp, Inc. (the “Merger Agreement”). 3. To approve one or more adjournments of the special meeting if necessary to solicit additional proxies if there are not sufficient votes to approve the Merger Agreement. For Against Abstain 2. To consider and vote upon an advisory, non-binding proposal to approve the compensation payable to the named executive officers of Hampden Bancorp, Inc. in connection with the transactions contemplated by the Merger Agreement. Meeting Attendance Mark the box to the right if you plan to attend the Special Meeting. IMPORTANT SPECIAL MEETING INFORMATION MMMMMMMMMMMM MMMMMMMMMMMMMMM 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext 000000000.000000 ext 000004 MR A SAMPLE DESIGNATION (IF ANY) ADD 1 ADD 2 ADD 3 ADD 4 ADD 5 ADD 6 ENDORSEMENT_LINE SACKPACK 1234 5678 9012 345 MMMMMMM 2 2 2 4 8 6 1 MR A SAMPLE (THIS AREA IS SET UP TO ACCOMMODATE 140 CHARACTERS) MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MR A SAMPLE AND MMMMMMMMM C 1234567890 J N T C123456789 qIF YOU HAVE NOT VOTED VIA THE INTERNET OR TELEPHONE, FOLD ALONG THE PERFORATION, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE.q Electronic Voting Instructions Available 24 hours a day, 7 days a week! Instead of mailing your proxy, you may choose one of the voting methods outlined below to vote your proxy. VALIDATION DETAILS ARE LOCATED BELOW IN THE TITLE BAR. Proxies submitted by the Internet or telephone must be received by 11:59 p.m., Eastern Time, on March 11, 2015. Vote by Internet • Go to www.investorvote.com/HBNK • Or scan the QR code with your smartphone • Follow the steps outlined on the secure website Vote by telephone • Call toll free 1-800-652-VOTE (8683) within the USA, US territories & Canada on a touch tone telephone • Follow the instructions provided by the recorded message

. 19 HARRISON AVENUE SPRINGFIELD, MASSACHUSETTS 01102 FORM OF REVOCABLE PROXY THIS PROXY IS SOLICITED ON BEHALF OF THE BOARD OF DIRECTORS Special Meeting of Stockholders To Be Held On March 12, 2015 at 10:00 a.m., Eastern Time The undersigned hereby appoints Glenn S. Welch and Tara G. Corthell, and each or any of them, as proxies (the “Proxies”) of the undersigned, with full power to act without the other and with full power of substitution in each, and hereby authorizes each of them to represent and to vote all shares of common stock, par value $0.01 per share, of Hampden Bancorp, Inc., a Delaware corporation (the “Company”), which the undersigned may be entitled to vote at the Special Meeting of Stockholders (the “Special Meeting”) to be held at the Sheraton Springfield Monarch Place Hotel, located at One Monarch Place, Springfield, MA 01144, on March 12, 2015, at 10:00 a.m., Eastern Time, and at any and all adjournments or postponements thereof, with all powers the undersigned would possess if personally present. The Proxies are authorized to vote as indicated herein upon the matters set forth herein and in their discretion upon all other matters that may properly come before the Special Meeting. Your shares of the Company’s common stock will not be voted unless a proxy form is signed and returned, a proxy is submitted by telephone or via the Internet or the shares are voted in person at the Special Meeting. The undersigned hereby acknowledge(s) receipt of a copy of the accompanying Notice of Special Meeting of Stockholders and the Proxy Statement/Prospectus with respect thereto and hereby revoke(s) any proxy or proxies heretofore given. PLEASE VOTE, DATE AND SIGN THIS PROXY ON REVERSE SIDE AND RETURN PROMPTLY IN THE ENCLOSED POSTAGE-PAID ENVELOPE. When properly executed, this proxy will be voted in the manner directed herein by the undersigned stockholder(s). If no direction is given, this proxy will be voted FOR the proposals set forth below. In their discretion, the Proxies are each authorized to vote upon any other matters that may properly be brought before the Special Meeting and at any adjournments or postponements thereof. A stockholder wishing to vote in accordance with the Board of Directors’ recommendations need only sign and date this proxy and return it in the enclosed envelope. Proxy — HAMPDEN BANCORP, INC. qIF YOU HAVE NOT VOTED VIA THE INTERNET OR TELEPHONE, FOLD ALONG THE PERFORATION, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE.q