Hammack is a surname. Notable people with the surname include:
- Bill Hammack (born 1961), American chemical engineer and professor
- Bobby Hammack (1922–1990), American musician
- Caylee Hammack (born 1994), American singer-songwriter
- Craig Hammack, American special effects supervisor
- Katherine Hammack (born 1959), American government official
- Mal Hammack (1933–2004), American college and professional football player
- William S. Hammack (born 1961), American chemical engineer
See also
- Ruth Hammack Alexander, American activist
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