The Cape Light Compact, as administered through Barnstable County, is an inter-municipal regional energy services organization made up of all 21 towns of Barnstable and Dukes counties. The purpose of the Compact is to represent and protect consumer interests in a restructured utility industry. As authorized by each town, the Compact administers the regional energy efficiency program and works with the combined buying power of the region's over 200,000 electric consumers to negotiate for lower cost electricity, including a green power offering, and other public benefits.

The Compact is made up of the following organizations: