Ailshie (June 19, 1868 – May 27, 1947) was an associate justice of the Idaho Supreme Court, alternating as chief justice with other members of the court.
First elected to the court in 1902, he became the youngest chief justice in the United States at the time.
During his 24 years on the court, Ailshie wrote more than 700 opinions.
At the time of his death, only one opinion in which he participated had been reversed by the U.S.