Interstate 10 in Arizona

Interstate 10
Pearl Harbor Memorial Highway
I-10 highlighted in red
Route information
Maintained by ADOT
Length	391.99 mi[1] (630.85 km)
Existed	1960–present
History	First section completed in 1960; Last section opened in 1990.
NHS	Entire route
Major junctions
West end	I-10 / US 95 at California state line near Blythe, CA
Major intersections	US 95 in Quartzsite US 60 near Brenda I-17 / US 60 (twice) in Phoenix US 60 in Tempe I-8 in Casa Grande I-19 in Tucson US 191 near Willcox
East end	I-10 at New Mexico state line
Location
Country	United States
State	Arizona
Counties	La Paz, Maricopa, Pinal, Pima, Cochise
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Arizona State Highway System Interstate US State Proposed Former
← I-8 → I-15

In the U.S. state of Arizona, Interstate 10 (I‑10), the major east–west Interstate Highway in the United States Sun Belt, runs east from California, enters Arizona near the town of Ehrenberg and continues through Phoenix and Tucson and exits at the border with New Mexico near San Simon. The highway also runs through the cities of Casa Grande, Eloy, and Marana. Segments of the highway are referred to as either the Papago Freeway, Inner Loop, or Maricopa Freeway within the Phoenix area and the Pearl Harbor Memorial Highway outside metro Phoenix.