Its earlier name was "Villa Santa Rosa", which was renamed to Bella Unión and raised to the status of "City" on 15 October 1963 by decree Ley No.13.180.
Its earlier name was "Villa Santa Rosa", which was renamed to Bella Unión by decree Ley No.8.207 on 20 April 1928. Its status was raised to "City" on 15 October 1963 by decree Ley No.13.180.