ZIP 81623 falls in Pitkin County, Colorado, where we hold 1 septic-related documents. We have not classified septic-versus-sewer status for this county, and we do not have a per-ZIP parcel count -- see the county page for what we hold and where the records are kept.
ZCTA 81623 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) |
|---|---|---|---|---|
| Pitkin County, Colorado | 54% | 1 | — | — |
| Gunnison County, Colorado | 24% | — | — | — |
| Garfield County, Colorado | 16% | 248 | — | — |
| Eagle County, Colorado | 6% | — | — | — |
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 have not measured septic-versus-sewer status for this county yet.
ZIP 81623 spans 4 counties: Pitkin County, Colorado, Gunnison County, Colorado, Garfield County, Colorado, Eagle County, Colorado.