William or Bill Goddard may refer to:

• William Henry Goddard (1795–1872), English merchant in Gambia
• William Goddard (engineer) (1913–1997), American engineer for IBM and inventor
• William Andrew Goddard III (born 1937), American professor of chemistry at the California Institute of Technology
• William Goddard (publisher) (1740–1817), American patriot and printer
• Bill Goddard (footballer) (1880–1939), Australian rules footballer