Bill Hewlett
- Birthday: 1913-05-20
- Deathday: 2001-01-12
- Place of birth: Ann Arbor, Michigan, USA
- Also know as: William Redington Hewlett
William (Bill) Hewlett was an American engineer and businessman who, along with his partner David Packard, co-founded the Hewlett-Packard Company (HP) in 1939. Their partnership, famously launched in a Palo Alto garage with just $538 in capital, is widely considered the birthplace of Silicon Valley.
