The Sanremo Music Festival 1951 (), officially the 1st Italian Song Festival (), was the inaugural edition of the Sanremo Music Festival, held at the Sanremo Casino in Sanremo, Liguria, between 29 and 31 January 1951, and broadcast by (RAI). The show was presented by Nunzio Filogamo.
According to the rules of this edition, every song was performed by one or two singers or groups, with three artists in total selected to perform 20 entries. The winning song of the festival was "Grazie dei fiori", performed by Nilla Pizzi.
All shows were broadcast via radio on Rete Rossa, beginning at 22:00 CET.