O
- "The Obvious Child" (1990)
- "Oh, Marion" (1980)
- "Old" (2000)
- "Old Friends" (1968)
- "Once Upon A Time There Was An Ocean" (2005)
- "One Man's Ceiling Is Another Man's Floor" (1973)
- "One-Trick Pony" (1979)
- "The Only Living Boy In New York" (1969)
- "Our Song" (as Jerry Landis, and with Art Garfunkel as Tom Graph, 1958)
- "Outrageous" (2003)
- "Overs"
Read more about this topic: List Of Songs Written By Paul Simon