Langan is a surname. Notable people with the surname include:
Bill Langan, a yacht designer and naval architect
Christopher Michael Langan, a high scorer in IQ tests
David Langan, Irish footballer
Gary Langan, audio engineer and record producer
Joy Langan, member of the Canadian House of Commons
Sarah Langan, American horror author
Sean Langan, British journalist and documentary filmmaker
Tom Langan, American television producer and writer
Tommy Langan, Gaelic footballer
Ciara Patricia Langan, Irish Artist
Janey Maher Langan, Daughter of Irish Artist
