Billy most often refers to:
Billy (name), (and list of people with the name)
Billy (surname), (and list of people with the surname)
Billy may also refer to:
Animals
Billy (dog breed), a French dog breed
Billy (pigeon), awarded the Dickin Medal in 1945
Billy (pygmy hippo), a pet of U.S. President Calvin Coolidge
Billy, a young male domestic goat
Film
Billy (Black Christmas), a character from Black Christmas
Billy (Saw), a puppet from Saw
Billy: The Early Years, a 2008 biographical film about Billy Graham
Billy (2024 film), a Canadian documentary
Literature
Billy (novel), 1990, by Whitley Strieber
Billy, a 2002 biography of Billy Connolly by Pamela Stephenson
Musicals
Billy (musical), based on Billy Liar
Billy, a 1969 Broadway musical with music and lyrics by Gene Allen and Ron Dante
Albums
Billy (Samiam album) (1992)
Billy (Feedtime album)
Songs
"Billy" (6ix9ine song), 2018
"Billy" (Kathy Linden song), a 1958 song by Kathy Linden
"Billy", a 1986 song by Céline Dion from The Best of Celine Dion
"Billy", a 1973 song by Bob Dylan from the Pat Garrett & Billy the Kid soundtrack
"Billy", a song by James Blunt from Back to Bedlam
"Billy", a song by Nik Kershaw from 15 Minutes
Places
Billy, Allier, France
Billy, Calvados, France
Billy, Loir-et-Cher, France
Billy, County Antrim, a parish in Northern Ireland
Billy-Berclau, in the Pas-de-Calais département
Billy-Chevannes, in the Nièvre département
Billy-le-Grand, in the Marne département
Billy-lès-Chanceaux, in the Côte-d'Or département
Billy-Montigny, in the Pas-de-Calais département
Billy-sous-Mangiennes, in the Meuse département
Billy-sur-Aisne, in the Aisne département
Billy-sur-Oisy, in the Nièvree département
Billy-sur-Ourcq, in the Aisne département
Television
Billy (1979 TV series), a CBS sitcom starring Steve Guttenberg
Billy (1992 TV series), an ABC sitcom starring Billy Connolly
"Billy" (Angel), a 2001 episode of Angel
Other uses
Billy (bookcase), sold by IKEA
Billy (crater), on the Moon
Billy (slave), African-American slave accused of treason
Billy Beer, a beer brand popularized by Billy Carter
Billy doll, a "gay doll" created in 1997
Billy the Kid (1859–1881), American Old West gunfighter born Henry McCarty, also known as William H. Bonney
Billycan or billy, a cooking pot used for camping