Clancy is both a given name and a surname, of Irish origin

Clancy may also refer to:

• Clancy Lowered the Boom, a song written by Hy Heath and Johnny Lange
• Clancy of the Overflow, a poem by Banjo Paterson
• Clancy of the Mounted
• The Overflow of Clancy, a poem written under the pseudonym of H.H.C.C.

• Clancy (band), British pub-rock band
• The Clancy Brothers, Irish folk music singing group
• Clancy (album), 2024 album by American musical duo Twenty One Pilots

• Clancy, Montana

• Clancy's, a restaurant in New Orleans
• Clancy's Fish Pub, a chain of restaurants in Western Australia.