ZIP 86503 falls in Apache County, Arizona, where we hold 23 parcels measured as septic county-wide and 2,003 on sewer. We do not have a per-ZIP parcel count for this county, so this is the county total, not a count specific to ZIP 86503.
ZCTA 86503 is not entirely inside one county. Land-area share is from the 2020 Census ZCTA-to-county relationship file.
| County | Land in this ZIP | Documents held | On septic (county) | On sewer (county) |
|---|---|---|---|---|
| Apache County, Arizona | 95% | — | 23 | 2,003 |
| Navajo County, Arizona | 5% | — | — | — |
Land-area overlap is from the 2020 Census Bureau ZCTA5-to-county relationship file, not an estimate of ours. Parcel and document counts are rows we hold, not a survey of every property in the ZIP. Last verified 2026-09-01.
We hold 23 parcels measured as septic for Apache County, Arizona as a whole, not broken out by ZIP.
ZIP 86503 spans 2 counties: Apache County, Arizona, Navajo County, Arizona.