Horatio Robert Forbes Brown (16 February 1854 – 19 August 1926) was a Scottish historian who specialized in the history of Venice and Italy.
Born in Nice, he grew up in Midlothian, Scotland, was educated in England at Clifton College and Oxford, and spent most of his life in Venice, publishing several books about the city. He also wrote for the Cambridge Modern History, was the biographer of John Addington Symonds, and was a poet and alpinist.