John A. Buttrick is an American attorney, judge, and former chairman of the Libertarian Party of Arizona.

Buttrick served as a part-time United States magistrate judge for the United States District Court for the District of Arizona from August 17, 2012 until August 16, 2016.

from Harvard Law School in 1976 and a bachelor's degree in philosophy from the University of Denver in 1973.

[2] Before his appointment to the bench, Buttrick was a partner at the law firm Brown and Bain (now Perkins Coie).

In 2001, Governor Jane Dee Hull appointed Buttrick to the Maricopa Superior Court.