Kathy, Kathie, Cathy or Cathie Smith may refer to:

• Cathy Smith (1947–2020), Canadian convicted of involuntary manslaughter in the death of John Belushi
• Cathy Smith (cricketer) (born 1961), Australian cricketer
• Kathy Smith (fitness personality) (born 1951), personal trainer
• Kathy Smith (filmmaker) (born 1963), Australian independent filmmaker
• Kathy Smith (Australian politician) (1948/1949–2017), Australian politician in the New South Wales Legislative Assembly
• Kathy Smith (American politician), member of the Fairfax County Board of Supervisors
• Kathy Smith, Californian singer-songwriter who performed at the Isle of Wight Festival 1970

• Cathy Gilliat-Smith (born 1981), English field hockey player
• Kate Smith (disambiguation)
• Katherine Smith (disambiguation)
• Kathleen Smith (disambiguation)
• Katie Smith (born 1974), basketball player