William Ayerst Ingram or W. Ayerst Ingram RBA (27 April 1855 Twickenham, Surrey – 20 March 1913 Falmouth, Cornwall) was a painter and member of the Newlyn School. He did notable Landscape art and Marine art. In 1906 he joined the Royal Institute of Oil Painters and in 1907 he joined the Royal Institute of Painters in Water Colours.