The Addison County Regional Planning Commission is composed of delegates and alternates from 21 municipalities and six citizen interest groups. ACRPC representatives are appointed to one-year terms starting July 1 by their municipalities. There are 38 seats for municipal delegates. Municipal representation reflects population; so larger municipalities have more representatives. However, all municipalities in the region have at least one delegate. There can be up to nine citizen interest groups represented on the commission. Alternates represent the municipality or interest group when the delegates cannot.