ZIP Code 86435 in Supai, AZ

Community Overview

Supai serves as the exclusive postal address for the Havasupai Indian Reservation, one of America's most geographically isolated communities. Located at the bottom of the Grand Canyon in Coconino County, this village of 224 residents is accessible only by helicopter, mule train, or an eight-mile trail descent from the canyon rim. The Havasupai Tribe has lived in this region for over 800 years.

Why PO Boxes Are Essential

Mail delivery to Supai doesn't follow typical patterns. This is a PO Box Only Zone across 1,940 square miles of reservation territory, and there's no alternative delivery method. The post office maintains 81 PO Boxes for 50 households, a 1.62 adoption rate that accounts for both village residents and tribal members living in more remote areas of the reservation. With no roads connecting Supai to the outside world, mail arrives by helicopter or mule, making the post office a critical lifeline for prescriptions, government documents, and supplies.

Population and Demographics

Of the 224 residents, 178 are Native American (79% of the population). The median age of 30.4 years and household ratio of 4.48 people per home indicate a young population with extended family structures typical of tribal communities. Most homes are renter-occupied (42 of 50 households), likely reflecting tribal housing arrangements rather than traditional homeownership patterns.

Geographic Context

The ZIP+4 records show just one street name, Main Street, with three delivery records across territory spanning nearly 2,000 square miles. That's among the lowest street density of any populated ZIP in America. A single rural carrier route and one highway contract route handle what limited addressed delivery exists, but the 81 PO Boxes handle the vast majority of mail for this isolated community.

Postal History

Supai has been a recognized ZIP code since before October 2004, when USPS tracking began. The alias "Havasupai Indian Reservation" is recognized by the postal system but isn't valid for mailing. All mail must be addressed to Supai, AZ 86435. Census economic data isn't available for this small population, but the community's economy centers on tourism to Havasu Falls and tribal government operations.

Mailing to Supai

Standard Format:

[Recipient Name]
PO Box [Number]
Supai, AZ 86435

All mail arrives by helicopter or mule train due to the community's location at the bottom of the Grand Canyon. This unique delivery method makes the Supai post office one of the most logistically challenging operations in the United States Postal Service.

Street Name Patterns

With just one street name across 1,940 square miles, this is one of the least addressed territories in the United States.