ZIP 97731 falls in Klamath County, Oregon, where we hold 12,351 parcels measured as septic county-wide and 15,455 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 97731.
ZCTA 97731 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) |
|---|---|---|---|---|
| Klamath County, Oregon | 71% | 189 | 12,351 | 15,455 |
| Douglas County, Oregon | 29% | 122 | 20,730 | 25,202 |
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 12,351 parcels measured as septic for Klamath County, Oregon as a whole, not broken out by ZIP.
ZIP 97731 spans 2 counties: Klamath County, Oregon, Douglas County, Oregon.