The 13th Arizona Territorial Legislative Assembly was a session of the Arizona Territorial Legislature which began on January 12, 1885, in Prescott, Arizona. The session's accomplishments included allocation of a variety of territorial institutions including a university, normal school, prison, and insane asylum. Nicknames bestowed to the session include the "bloody thirteenth" due to fights in the halls of government and nearby saloons, and the "thieving thirteenth" due to the very large appropriations approved by this legislature.