Hanmer can refer to:

• David Hanmer, 14th century English judge
• Lee F. Hanmer, social worker
• Margaret Hanmer, Owain Glyndwr's wife
• Paul Hanmer, South African composer and pianist
• Ronald Hanmer, composer
• Sir Thomas Hanmer, 2nd Baronet (1612–78), second baronet of Hanmer, Flintshire
• Sir Thomas Hanmer, 2nd Baronet (1747–1828) of the second creation
• Sir Thomas Hanmer, 4th Baronet, fourth baronet of Hanmer, Flintshire and Speaker of the House of Commons

• Hanmer baronets

• Hanmer, Ontario, Canada
• Hanmer, Wrexham, Wales
  • Hanmer Mere
• Hanmer River, near Hanmer Springs, New Zealand
• Hanmer Springs in New Zealand

• Hanmer Springs Ski Area