Westbury is a civil parish with an elected town council of fifteen members: five for each of three wards with the same boundaries as the electoral divisions. The council has significant consultative roles, in addition to responsibility for certain local services. The chairman has the title of Mayor of Westbury which is a wholly ceremonial role. Around 2020, the council took over the running of the town's play areas, toilets and flower planting from Wiltshire Council, and supplemented reduced services from Wiltshire Council with its own staff. The council also runs the Grade II listed Laverton Institute which serves as the town hall and as a venue for events and meetings.