Zealandia may refer to:
- Historic places
- Zealandia (estate), an Asheville, North Carolina mansion built by Philip Henry and named in the National Register of Historic Places
- Journalism
- Zealandia (newspaper), a New Zealand Catholic newspaper published weekly from 1934 to 1989.
- Natural features
- Zealandia (continent), a nearly submerged continent or microcontinent that sank after breaking away from Antarctica between 60 and 85 million years ago
- Zealandia Bank, a submarine volcano in the Marianas archipelago
- Ships
- British predreadnought battleship HMS New Zealand, which served in the Royal Navy from 1905 to 1921 and was renamed HMS Zealandia in 1911
- SS Zealandia, a historically significant Australian cargo and passenger ship that served as a troopship in both World War I and World War II
- ST Zealandia, a British tugboat
- Symbolism
- Zealandia (personification), a female personification of New Zealand, said to be the daughter of Britannia
- Town
- Zealandia, Saskatchewan, a town in Canada
- Wildlife sanctuary
- Zealandia (wildlife sanctuary), in Wellington, New Zealand