George Barnett (11 February 1876 – 10 April 1965) was an Irish historian, archaeologist, botanist, geologist, folklorist and poet.
Self-taught, he acquired a vast knowledge of the Sperrin Mountains through experience, experimentation, observation, and traditional lore.
He discovered many prehistoric sites, although he is best known for his discovery of the Beaghmore stone circles, and developed the theory that they were an ancient lunar observatory.
This theory was expressed in his poem, The Beaghmore Stone Circles.