58 W. Congress St.
Street Taco really has the best of both worlds: The speed of buying a taco from your favorite side-of-the-road taco guy, and that fancy-schmancy variety that has put Tucson on the international culinary map . They've got asada, pollo asado, al pastor, carnitas, shredded beef, fish and even veggie tacos, so you'll leave with something to taco 'bout no matter who you are.
Runners up:
2. BK Tacos
3. BOCA Tacos y Tequila