Keith Mason may refer to:

• Keith Mason (judge) (born 1947), judge in New South Wales, Australia
• Keith Mason (rugby league) (born 1982), English born professional rugby league footballer
• Keith Mason (scientist) (born 1951), chief executive of the Science and Technology Facilities Council
• Keith Mason (activist), founder of Personhood USA
• Keith Mason (footballer) (born 1958), former professional footballer
• Keith Antar Mason (born 1956), American writer, performance artist, and playwright