Sir Ernest Albert Waterlow RA (24 May 1850 – 25 October 1919) was an English painter. He was born in London, and received the main part of his art education in the Royal Academy schools, where, in 1873, he gained the Turner medal for landscape-painting.
He was elected associate of the Royal Watercolour Society in 1880, member in 1894, and president in 1897; associate of the Royal Academy in 1890, and academician in 1903; and he was knighted in 1902. Sir Sydney Waterlow was his uncle.
He began to exhibit in 1872 and produced a considerable number of admirable landscapes, in oil and watercolour, handled with grace and distinction. One of his pictures, Galway Gossips, is in the Tate collection.