Ninnis

Ninnis may refer to:


 * Ninnis Glacier
 * Mertz-Ninnis Valley
 * 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