Historical Marker
Yuma Territorial Prison
Historical marker location:
220 Prison Hill Road, Yuma, Arizona
( Marker can be reached from Prison Hill Road, ½ mile north of Harold C. Giss Parkway.)
Yuma Territorial Prison State Historic Park.
Arizona was the last contiguous state to join the Union: Arizona became the 48th state in the US on February 14, 1912. It was the last of the contiguous states to be admitted to the Union.