Four district councils and the county council are to be axed and a new single super-council will govern Wiltshire, it has been decided.
The county will soon have a single unitary authority
The bid to have one council covering the whole of the county has received the backing of the government.
Work will now start on transforming the county's five councils into one with the new council expected to be launched in August 2008.
It is claimed the change could save taxpayers £15m each year by 2012.
County Council leader Jane Scott said: "We are delighted with this decision which we believe will bring the best for the people of Wiltshire.
"One council will bring simplicity, clarity and value for money - it will strip away layers of red tape and get the services and decision making closer to the people."
Currently, Wiltshire County Council is responsible for areas such as education, social services, highways and libraries.
The four district councils to be abolished (Kennet, West Wiltshire, North Wiltshire and Salisbury) are broadly responsible for areas such as leisure, street cleaning, planning and refuse collection.
The move would see residents go to one council when they are accessing a service as well as a reduction in the number of councillors.
Michael Williams of the Wessex Association of Chambers of Commerce said: "We are pleased the government has not delayed this decision and we look forward to working with the new authority."
The town of Swindon remains unaffected by the decision as it is already governed by a unitary authority - Swindon Borough Council.