I-19 highlighted in red | ||||
Route information | ||||
Maintained by ADOT | ||||
Length | 102.08 km[1] (63.43 mi) | |||
Existed | 1963[2]–present | |||
NHS | Entire route | |||
Major junctions | ||||
South end | ![]() | |||
North end | ![]() | |||
Location | ||||
Country | United States | |||
State | Arizona | |||
Counties | Santa Cruz, Pima | |||
Highway system | ||||
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Interstate 19 (I-19) is a north–south Interstate Highway located entirely within the US state of Arizona. I-19 travels from Nogales, roughly 90 meters (300 ft) from the Mexican border, to Tucson, at I-10. The highway also travels through the cities of Rio Rico, Green Valley, and Sahuarita.
Having a total length of just over 102 kilometers (63 mi), I-19 is the seventh-shortest primary (two-digit) Interstate Highway in the contiguous 48 states, where only I-87 (North Carolina), I-97 (Maryland), I-86 (Idaho), I-14 (Texas), I-11 (Nevada), and I-2 (Texas) are shorter.
While the highway is short, it is a very important corridor, serving as a fast route from Tucson and Phoenix (via I-10) to the Mexican border. The highway is a portion of the US section of the CANAMEX Corridor, a trade corridor that stretches north from Mexico across the US to the Canadian province of British Columbia.