Arthur Hiram Day (February 1, 1890 – January 11, 1967) was an American lawyer, politician, judge, and college football coach.

In August 1912, Day was appointed physical director and coach at Trinity University in Waxahachie, Texas.

[2] He was a captain in the United States Army from 1918 to 1919, member of the Allied Expeditionary Forces in World War I, and was wounded in action August 5, 1918.

He was elected to a six-year term to the Ohio Supreme Court in November 1934, and served January 1, 1935, to December 31, 1940.

[1] Early in life, Arthur H. Day was a member of the Veterans of Foreign Wars, American Legion, Masons, Loyal Order of Moose, Sigma Alpha Epsilon, and Delta Theta Phi.