Peter Mieg (5 September 1906 – 7 December 1990) was a Swiss composer, painter and journalist.
In the early 1930s Mieg became a journalist writing articles about art, music and literature for newspapers such as the Basler Nachrichten, the Weltwoche and the Badener Tagblatt.
Between 1933 and 1939 he became friends with the conductor and patron Paul Sacher and the composers Béla Bartók, Igor Stravinsky, Arthur Honegger and Bohuslav Martinu.
In the 1940s Mieg completed his musical formation with Frank Martin.
Peter Mieg's grandaunt was Swiss composer and singer Fanny Hünerwadel (1826-1854).