Sing is a verb in the English language used to describe the activity of singing a song.

It may also refer to:

In music:

• "Sing (Annie Lennox song)" a 2007 single from Annie Lennox
• "Sing" (Travis song), music single by the alternative rock band Travis
• "Sing" (Dresden Dolls single), 2006 music single from Boston band The Dresden Dolls
• "Sing" (The Carpenters song), a song written by Joe Raposo and performed on Sesame Street; reprised by the Carpenters in 1973
• "Sing (To Me)", a track from Blur's 1991 album Leisure
• "Sing!", a song from the Broadway musical A Chorus Line

In film or theater:

• SING!, an annual, entirely student-run production put on by the students of some high schools in New York City
• Sing, a 1989 film directed by Richard J. Baskin about SING!
• Sing!, an Academy Award nominated 2001 documentary directed by Freida Lee Mock

People:

• Matt Sing, Australian rugby league player
• Sing, the English name for the Chinese singer Chew Sin Huey

Other uses:

• Sing#, an extension to the Spec# language developed by Microsoft Research
• Sing Buri Province in Thailand
• To "sing" is slang for turn state's evidence
• SING is a technology from Adobe to handle rare Japanese characters.