NUL may refer to:
- National University of Lesotho
- National Urban League, US civil rights organization
- Nul (band) or NuL, a South African band
- Nul, rulers of a Galactic Empire in Brian Aldiss's Bow Down to Nul
- Nulato Airport (IATA code), airport in Nulato, Alaska
Computers
edit- The abbreviation for the null character in many character sets
- The NUL: device in DOS and related systems