63 may refer to:
- 63 (number)
- one of the years 63 BC, AD 63, 1963, 2063
- +63, telephone country code in the Philippines
- Flight 63 (disambiguation)
- 63 (Las Vegas), a shopping mall
- 63 (album), by Tree63
- 63 (mixtape), by Kool A.D.
- "Sixty Three", a song by Karma to Burn from the album Mountain Czar, 2016
- 63 Ausonia, a main-belt asteroid