A nullah is a narrow valley.
Nullah or Nulla may also refer to:
- Cronulla, New South Wales, nickname Nulla
- Zero, nulla, nullo, or the letter N as an unofficial Roman numeral (from the Latin word nulla, meaning "none", "nothing", or the number zero)
- Nulla nulla, alternative name for Waddy, an Australian Aboriginal war club
Topics referred to by the same term