John Cairns

John Cairns is the name of the following people:

• John Cairns (theologian) (1818-1892), British theologian
• John Cairns (molecular biologist) (1922-2018) British medical doctor, virologist and molecular biologist
• John Cairns (ecologist) (1923-2017), American zoologist and ecologist
• John Cairns (cardiologist) , Canadian cardiologist

This is a disambiguation page for differentiating between several terms identified with the same word.