Ninnis may refer to:
- Ninnis Glacier
- Belgrave Edward Sutton Ninnis (1887–1912), British Army officer and Antarctic explorer
- Belgrave Ninnis (1837–1922), Royal Navy surgeon, pioneer of Northern Australia, surveyor, Arctic explorer, and Freemason
- Scott Ninnis (born 1965), Australian basketball player
See also
edit- Ninni, a given name