The 1973 Gwent County Council election was held on Thursday 12 April 1973 to elect councillors to the new Gwent County Council, governing the new county of Gwent, Wales. It took place on the same day as other county council elections in the United Kingdom.
These were the first elections to the new county council, which would come into effect on 1 April 1974. Future elections would take place every four years, with the next one scheduled for April 1977.
The 1973 election saw the Labour Party win a strong majority on the Council.