Vail is a census-designated place (CDP) in Pima County, Arizona, United States.

The area is known for the nearby Colossal Cave, a large cave system, and the Rincon Mountains District of Saguaro National Park, a top tourism spot within Arizona.

Vail was originally a siding and water stop on the Southern Pacific Railroad.

It was located on the last section of flat land before the train tracks followed the old wagon road into the Cienega Creek bed.

[5] According to the United States Census Bureau, the CDP has a total area of 18.2 square miles (47 km2), all land.

As of the census of 2010, there were 10,208 people residing in Vail, Arizona (a 248% increase from 2000).

According to the census, Vail is 69.8% non-Hispanic white, 3.3% Black or African American, 0.9% Native American, 2.4% Asian, 0.2% Pacific Islander, 5.0% from other races, and 4.1% were mixed race.