Henry Davis Ross (September 12, 1861 – February 9, 1945) was an American jurist and politician. Before his election to the Arizona Supreme Court, he served as county attorney for both Coconino and Yavapai counties as well as a member of the Arizona Territorial Legislature. Following Arizona statehood, he served on the state's highest bench for 33 years and was selected chief justice on six occasions. Ross served the longest tenure in the court's history while his brother, John Wilson Ross, served the shortest.