ZIP 88431 falls in Guadalupe County, New Mexico, where we hold 17 parcels measured as septic county-wide and 103 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 88431.
ZCTA 88431 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) |
|---|---|---|---|---|
| Guadalupe County, New Mexico | 58% | — | 17 | 103 |
| San Miguel County, New Mexico | 42% | — | 5,658 | 5,663 |
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 17 parcels measured as septic for Guadalupe County, New Mexico as a whole, not broken out by ZIP.
ZIP 88431 spans 2 counties: Guadalupe County, New Mexico, San Miguel County, New Mexico.