| City: | Fort Huachuca, Arizona |
| City Alias: | Sierra Vista |
| County: | Cochise County |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 10:20:08 AM |
| Population: | No Population Data |
| Area Code: | 520 |
| Classification: | PO Box |
| Coordinates: | 31.5640, -110.3435 |
| Quick Link: |
Fort Huachuca operates as a military installation in Arizona's Cochise County, where 151 PO Box holders receive mail through a dedicated postal facility. The ZIP code serves active-duty personnel, civilian employees, and military families stationed at this historic Army post.
Mail delivery follows military installation protocols. All 151 delivery points operate through numbered PO Boxes at the post office, with no street delivery routes within the ZIP. The 30 ZIP+4 records all correspond to PO Box assignments, reflecting the secure mail handling required on military bases. Seventeen businesses maintain boxes here, serving the installation's commercial needs from military exchanges to on-base contractors.
The facility operates under USPS classification B, meaning it shares operations with the larger Fort Huachuca postal network. Mail addressed to both "Fort Huachuca" and "Sierra Vista" reaches the same destination, with Sierra Vista serving as the accepted alternate city name. This dual naming reflects the installation's integration with the surrounding civilian community while maintaining its distinct military identity.
Fort Huachuca's postal service differs from typical residential ZIPs. The ZIP contains no occupied housing units in civilian census counts, as military barracks and on-base housing fall outside standard demographic tracking. Without population or household data, the post office serves an institutional community whose size fluctuates with military assignments rather than permanent residence patterns.
No street delivery routes exist within this military installation ZIP code. All mail delivery occurs through PO Box assignments at the base post office.
ZIP Code 85670 is designated for PO Box delivery only; business establishment and employment data are not available.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 2,792Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 0Source: CBP |
| 1st Quarter Payroll: | $0Source: CBP |
| Annual Payroll: | $0Source: CBP |
| # of Employees: | 0Source: CBP |
ZIP Code 85670 is located in Cochise County, Arizona, within the Sierra Vista-Douglas, AZ Metropolitan Statistical Area (CBSA 43420) and Arizona's 6th Congressional District. This Metro area has a population of 131,346 people, about 0.00% of whom live in ZIP Code 85670. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Sierra Vista-Douglas, AZSource: Census |
| CBSA Number: | 43420Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 131,346Source: Census |
| MSA: | Source: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 06Source: USPS |
| Congressional Land Area: | 625.07 sq miSource: Census |
| PMSA: | Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | --Source: Census |
| Place Name: | --Source: Census |
We could not locate which school district 85670 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.