A bilby is an Australian mammal in the genus Macrotis; the two species are known as:
Bilby may also refer to:
- People
- Bilby, a variant of the surname Bilbe
- Bruce Bilby (1922-2013), British mechanical engineer
- Grahame Bilby (born 1941), New Zealand cricketer and soccer player
- Jasper S. Bilby, (1864–1949) American surveyor
- John S. Bilby (1832–1919), founder of the Bilby Ranch, USA
- Kenneth M. Bilby (born 1953), American ethnomusicologist
- Kenneth W. Bilby (1918-1997), American awardee of the Legion of Honor, executive vice president and author
- Oscar Bilby, American farmer claimed as the inventor of the hamburger in 1891
- Richard Bilby (1931-1998), United States district judge for Arizona
- Places
- Other