Sir Dennis Holme Robertson (May 23, 1890-April 21, 1963) was an English economist who taught at Cambridge and London Universities. He worked closely with John Maynard Keynes in the 1920s and 1930s, during the years when Keynes was developing many of the ideas that later were incorporated in his General Theory of Employment Interest and Money. Keynes wrote that at that time, working with Robertson, it was good to work with someone who had a "completely first class mind". Ultimately however, differences of temperament and views about economic theory and practice led to some estrangement between the two men.

Robertson's publications include A Study of Industrial Fluctuations and Banking Policy and the Price Level.