Tresco is a locality in Victoria, Australia, located approximately 23 km from Swan Hill. It was named after Tresco, Isles of Scilly, England. At the 2006 census, Tresco had a population of 604.
Tresco Post Office opened on 14 September 1914 at the railway station and closed in 1993. A Tresco West Post Office was open between 1923 and 1925.