Dan may refer to:
- Dan (Day 3) - a man who called David Palmer during Season 3.
- Dan (Day 4) - a thug who harassed Kalil Hasan during Season 4
- Dan (Day 5) - a flight attendant during Season 5
- Dan (Day 6) - the head of Secret Service for Wayne Palmer during Season 6
- Dan Mounts - a thug hired by Ira Gaines to kidnap Kim Bauer during Season 1
- Dan Pascal - a U.S. Deputy Marshal in Chaos Theory.
- Dan Wilcox - a White House official mentioned in 24: Redemption