ZIP 83235 falls in Custer County, Idaho, where we hold 2,013 parcels measured as septic county-wide and 1,194 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 83235.
ZCTA 83235 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) |
|---|---|---|---|---|
| Custer County, Idaho | 94% | — | 2,013 | 1,194 |
| Lemhi County, Idaho | 6% | — | 3,045 | 1,755 |
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 2,013 parcels measured as septic for Custer County, Idaho as a whole, not broken out by ZIP.
ZIP 83235 spans 2 counties: Custer County, Idaho, Lemhi County, Idaho.