The Sanremo Music Festival 1966 (), officially the 16th Italian Song Festival (), was the 16th annual Sanremo Music Festival, held at the Sanremo Casino in Sanremo between 27 and 29 January 1966, and broadcast by (RAI). The show was presented by Mike Bongiorno, assisted by Paola Penni e Carla Maria Puccini. Gianni Ravera served as artistic director.
According to the rules of this edition every song was performed in a double performance by a couple of singers or groups. The winners of the festival were Domenico Modugno and Gigliola Cinquetti with the song "Dio, come ti amo". Modugno went on to perform the song for at the Eurovision Song Contest 1966.
All shows were broadcast on Secondo Programma (radio). The semi-finals was broadcast on Secondo Programma (radio) at 21:10 CET and on Secondo Programma (television) at 21:15 CET. The final was broadcast on Programma Nazionale and on Secondo Programma at 21:00 CET.
Known details on the broadcasts in each country, including the specific broadcasting stations and commentators are shown in the tables below.