Keith Henderson OBE RP RSW RWS ROI (17 April 1883 – 24 February 1982) was a Scottish painter who worked in both oils and watercolours, and who is known for his book illustrations and his poster work for London Transport and the Empire Marketing Board. He had a long professional career that included periods as a war artist in both the First World War, in which he served in the trenches, and in the Second World War.