On August 13th, 2011, The WiredWest Cooperative was officially formed by charter member towns. All member towns passed two town votes to form a Municipal Light Plant, under Massachusetts General Laws Chapter 164. This step is required to join the Cooperative as a voting member.

Towns shown below are official voting members of the WiredWest Cooperative. The town of Montgomery has also recently become a member. Requirements for new towns including being contiguous and directly accessible by road from another WiredWest member town, and less than 50% served by cable broadband. New members also must be voted in by a majority of the Board of Directors.