Interstate 19

Interstate 19
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	BL 19 in Nogales
Major intersections	SR 189 in Nogales BL 19 north of Nogales SR 289 in Rio Rico SR 86 in Tucson
North end	I-10 in Tucson
Location
Country	United States
State	Arizona
Counties	Santa Cruz, Pima
Highway system
Interstate Highway System Main Auxiliary Suffixed Business Future Arizona State Highway System Interstate US State Proposed Former
← I-17 → SR 24

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.