Maltby, from Old Norse "Malti's (possibly sharp or bitter) farm", can be the name of a person, an organization, or a place:
- Places
- Maltby, Lincolnshire, England
- Maltby, South Yorkshire, England, near Rotherham
- Maltby, North Yorkshire, England, near Middlesbrough
- Maltby, California, USA
- Maltby, Washington, USA
- Maltby le Marsh, in Lincolnshire, England
- People
- Christopher Maltby, the British Major-General in command of Hong Kong who defended against the Japanese attack on the colony in December, 1941
- H.F. Maltby, prolific UK (originally from South Africa) actor and writer for many media
- Jasper A. Maltby, American Civil War general
- John Maltby, distinguished British painter and ceramics maker, born 1936
- Kirk Maltby, active NHL ice hockey player
- Lauren Maltby, actress featured in all three Zenon Disney Channel (US) movies
- Margaret Eliza Maltby, American physicist
- Ralph Maltby, noted golf equipment designer, author, and speaker, originally from Florida, USA
- Richard Maltby, Sr. American bandleader
- Richard Maltby, Jr., Tony Award-winning Broadway (New York City) theatre director and lyricist
- Other
- The Maltby Collection, BBC Radio 4 series