Donald LaFayette Cunningham (April 21, 1866 – March 24, 1947) was one of the original Justices of the Supreme Court of Arizona, serving from February 14, 1912, to January 4, 1921.

He graduated from Gaylesville High School and read law with John L. Burnett, a leading attorney and future member of Congress from Alabama.

There, Cunningham worked as a laborer for several months before briefly moving to Phoenix before he returned to Flagstaff, where he was employed for a time in the lumber mills and in the District Attorney's office.

"[3] Cunningham, along with Albert Baker and Alfred Franklin, have been called the "fathers of article XVIII, section 5," of Arizona's Constitution, which provides that juries will determine matters of contributory negligence.

While Cochise County Attorney shortly before Arizona was admitted as a state, Cunningham made public his ambition to become judge of the superior court.