Astaire may refer to:
- Fred Astaire, a Hollywood dancer, singer, and actor
- Adele Astaire, a dancer and entertainer and Fred Astaire's older sister
- Interavia Airlines, a Russian airline originally known as Astair Airlines
- Blondfire, an American band formerly known as "Astaire"
- Astaire (company), a London stockbroking company
- Astaire, a Brazilian-American band, now called Blondfire
- A misspelling of "A Stair."