131 may refer to:
- 131 (number)
- AD 131
- 131 BC
- 131 (album), the album by Emarosa
- 131 (MBTA bus), the Massachusetts Bay Transportation Authority bus. For the MBTA bus, see 131 (MBTA bus).
- 131 (New Jersey bus), the New Jersey Transit bus
- 131 Vala, a main-belt asteroid
- Fiat 131, also known as the Tofaş Murat 131, a family car
- SEAT 131, a rebadged Fiat 131