Where Is Area Code 520?
Area code 520 is found in the US state of Arizona. Primarily servicing the city of Tucson (population: 873192), area code 520 covers 5 counties of Arizona.
Located in the Mountain time zone, area code 520 is on the same time as Phoenix, AZ.
Area code 520 was brought into effect on March 19, 1995. 520 was split from the parent 602 area code.
Counties in Area Code 520
- Cochise,
- Maricopa,
- Pima,
- Pinal,
- Santa Cruz.
Most Populous Cities in Area Code 520
| City | County | City Population | Time Zone |
|---|---|---|---|
| Tucson | Pima | 873,192 | MST |
| Casa Grande | Pinal | 64,593 | MST |
| Maricopa | Pinal | 53,204 | MST |
| Sierra Vista | Cochise | 50,288 | MST |
| Florence | Pinal | 34,591 | MST |
| Green Valley | Pima | 28,568 | MST |
| Sahuarita | Pima | 23,859 | MST |
| Marana | Pima | 23,177 | MST |
| Nogales | Santa Cruz | 22,997 | MST |
| Vail | Pima | 22,022 | MST |
| Douglas | Cochise | 21,349 | MST |
| Rio Rico | Santa Cruz | 19,032 | MST |
| Eloy | Pinal | 18,572 | MST |
| Tucson | Pinal | 18,257 | MST |
| Coolidge | Pinal | 15,280 | MST |
| Arizona City | Pinal | 11,006 | MST |
| Willcox | Cochise | 9,864 | MST |
| Benson | Cochise | 9,523 | MST |
| Hereford | Cochise | 9,466 | MST |
| Bisbee | Cochise | 7,195 | MST |
| Sells | Pima | 6,572 | MST |
| Fort Huachuca | Cochise | 5,632 | MST |
| Huachuca City | Cochise | 5,597 | MST |
| Sacaton | Pinal | 4,683 | MST |
| Ajo | Pima | 4,492 | MST |
Note: The above list is based off of the top 25 most populous cities in the area code as per 2012 United States Census Bureau estimates.
View all United States Area Codes.
This page was last updated on July 3, 2015.