Bill Farmer (born 1952) is an American voice actor and comedian.

Bill, Billy or William Farmer may also refer to:

• Bill Farmer (public servant) (born 1947)
• Bill Farmer (baseball) (1864–1928)
• William Farmer (runner) in 2009 Laugavegur Ultramarathon
• Billy Farmer, character in The Leopard from Lime Street
• Billy Farmer, pitcher for Boston Red Sox

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