Harry Macdonald Kyle (1872–1951), given name Henry, was a Scottish ichthyologist and fisheries scientist. Kyle graduated from St Andrews University where he was a protégé of William Carmichael McIntosh. In 1903 he was appointed as Biological Secretary to the International Council for the Exploration of the Sea (ICES), based in Copenhagen. He was an expert on flatfish, especially plaice, and worked with Walter Garstang at Plymouth. Later he collaborated extensively with Ernst Ehrenbaum of the Museum of Natural History in Hamburg. He made important contributions to fisheries science and produced definitive works which were among the first scientific studies to address the issue of overfishing.