Barnes is a masculine given name borne by:
Barnes Compton (1830–1898), American planter and politician Barnes Murphy (born 1947), Irish Gaelic footballer Barnes Ratwatte (1883–1957), Sri Lankan Sinhala legislator and headman Barnes Ratwatte II (died 2004), Sri Lankan Sinhala judge Barnes Wallis (1887–1979), English scientist, engineer and inventor