Located in the Rocky Mountains region of the southwestern US, Arizona ranks 6th in size among the 50 states.
The total area of Arizona is 114,000 sq mi (295,260 sq km), of which land takes up 113,508 sq mi (293,986 sq km) and inland water 492 sq mi (1,274 sq km). Arizona extends about 340 mi (547 km) E-W; the state's maximum N-S extension is 395 mi (636 km).
Arizona is bordered on the N by Utah and on the Eby New Mexico (with the two borders joined at Four Corners, the only point in the US common to four states); on the S by the Mexican state of Sonora; and on the W by the Mexican state of Baja California Norte, California, and Nevada (with most of the line formed by the Colorado River). The total boundary length of Arizona is 1,478 mi (2,379 km). The state's geographic center is in Yavapai County, 55 mi (89 km) ESE of Prescott.