John Dill Robertson (March 8, 1871 – August 20, 1931) was a medical professional and politician. He served as Chicago city health commissioner, president of the Chicago Board of Education, and president of the Chicago West Parks Board. In 1927, Robertson ran a third-party campaign for Chicago mayor. As a politician, Thompson was affiliated with the Republican Party. He was an ally of Republican boss Frederick Lundin, and prior to his 1927 mayoral campaign against him, had also long been an ally of William Hale Thompson.