Keith Baker may refer to:

• Keith Baker (game designer) (born 1969), American game designer
• Keith Baker (gridiron football) (born 1957), American football player active in the Canadian Football League
• Keith Baker (footballer) (1956–2013), English football player
• Keith Baker (musician) (born 1950), American drummer for Uriah Heep
• Keith Michael Baker (born 1938), British historian
• Keith Baker (fl. 1980s–1990s), Australian High Commissioner to Vanuatu from 1988–1990

• Keith Bakker (born 1960), American-Dutch former mental health practitioner and convicted criminal