Interstate 19

Interstate 19
I-19 highlighted in red
Route information
Maintained by ADOT
Length:	101.84 km (63.28 mi)
Major junctions
South end:	I-19 BL in Nogales
	SR 189 in Nogales I-19 BL north of Nogales SR 289 in Rio Rico SR 86 in Tucson
North end:	I-10 in Tucson
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Arizona Highways Interstate U.S. State Unconstructed Former ← I-17 SR 24 →

Interstate 19 (I-19) is an intrastate Interstate Highway located entirely within the U.S. state of Arizona. I-19 travels from Nogales, roughly 300 feet (91 m) 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 63 miles (101 km), I-19 is the fourth-shortest primary (two-digit) Interstate Highway in the contiguous 48 states, where only I-97, I-86 (western), and I-2 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 United States section of the CANAMEX Corridor, a trade corridor that stretches north from Mexico across the United States to the Canadian province of Alberta.

In Nogales, the southern terminus of I-19 is at West Crawford Street, adjacent to the international port of entry, and southbound travelers can continue into Nogales, Sonora, Mexico, via state-maintained surface roads, and connect with Mexico Federal Highway 15 either to the south or west of Nogales, Sonora.