Arizona State Route 84

State Route 84
Gila Bend Highway Casa Grande-Picacho Highway
Signed SR 84 highlighted in red Unsigned SR 84 highlighted in grey
Route information
Maintained by ADOT, Pinal County, City of Casa Grande and City of Eloy
Length	40.94 mi[1] (65.89 km) Includes the 22.87 mi (36.81 km) signed section and the 18.11 mi (29.15 km) unsigned section
Existed	September 9, 1927 (1927-09-09)–present
History	Originally ran between Gila Bend and Tucson
Major junctions
West end	I-8 west of Stanfield
Major intersections	SR 347 near Stanfield SR 287 / SR 387 in Casa Grande I-10 in Arizola SR 87 near Eloy
East end	I-10 / SR 87 near Picacho
Main Section
Location
Country	United States
State	Arizona
Highway system
Arizona State Highway System Interstate US State Proposed Former
← SR 83 → SR 84A

State Route 84, also known as SR 84, is a 41-mile (66 km) east–west highway in south-central Arizona, with its western terminus at Exit 151 of Interstate 8 and its eastern signed terminus at its junction with State Route 387 and State Route 287 in Casa Grande. An unsigned section, which is mostly maintained by local governments, runs from the SR 287 and SR 387 junction southeast through Arizola and Eloy. East of Eloy, SR 84 is concurrent with the beginning 0.87 miles (1.40 km) of State Route 87 just north of Interstate 10 near Picacho.

Formerly, SR 84 ran between Tucson and Gila Bend, serving as the primary route for travelers to San Diego, California and bypassing U.S. Route 80 through Phoenix. SR 84 was also part of the Broadway of America transcontinental highway in the mid-20th Century. It was mostly replaced by both I-10 and I-8 in the late 1960s and early 1970s.