Geoffrey or Geoff Baker may refer to:

• Geoffrey Baker (British Army officer) (1912–1980), head of the British Army
• Geoffrey Baker (cricketer) (born 1970), New Zealand cricketer
• Geoffrey Baker (rower), English rower
• Geoff Baker (journalist) (born 1968), Canadian-born journalist
• Geoff Baker (politician) (born 1969), member of the Western Australian Legislative Assembly