Niobia
Niobia may refer to:
- Niobia Bryant, American novelist of romance and mainstream fiction
- Niobia (cnidarian), a genus of cnidarians in the family Niobiidae
- Three forms of niobium oxide:
- Niobium monoxide (niobium(II) oxide), NbO
- Niobium dioxide (niobium(IV) oxide), NbO2
- Niobium pentoxide (niobium(V) oxide), Nb2O5