亚利桑那州（英语：State of Arizona）是第48个加入美国联邦的州，位于美国的西南方。该州同时也是四角落州之一，与新墨西哥州、犹他州、内华达州、加州和墨西哥为邻，并与科罗拉多州相连。

亚利桑那州的主要大城市是凤凰城、土桑、优玛和旗杆市。在该州，除大峡谷国家公园之外，还有许多国家森林、公园和纪念地等。亦有许多印地安保留区。位于大菲尼克斯都会圈坦佩市的亚利桑那州立大学是该州教育枢纽之一，同时亦是世界闻名的一级学术科研重镇。

Arizona (/ɛrɪˈzoʊnə/; /ærɪˈzoʊnə/) (Navajo:Hoozdo Hahoodzo; O'odham: Alĭ ṣonak) is a state in the southwestern region of the United States. It is also part of the Western United States and of the Mountain West states. It is the sixth largest and the 14th most populous of the 50 states. Its capital and largest city is Phoenix. Arizona is one of the Four Corners states. It has borders with New Mexico, Utah, Nevada, California, and Mexico, and one point in common with the southwestern corner of Colorado. Arizona's border with Mexico is 389 miles (626 km) long, on the northern border of the Mexican states of Sonora and Baja California.