156 may refer to:
- 156 (year)
- 156 (number)
- UFC 156, a mixed martial arts event held by the Ultimate Fighting Championship
- Alfa Romeo 156, a compact executive car
- Martin 156, a very large flying boat aircraft intended for trans-Pacific service
- Radical 156, one of the 20 Kangxi radicals composed of 7 strokes meaning "fun"
- Lectionary 156, a Greek manuscript of the New Testament
- British Rail Class 156, A Train built in 1988 by Metro-Cammell