In Marion County, Oregon, which covers Jefferson, we have measured 9,485 parcels on septic and 81,359 on sewer. That is a county measurement. We do not hold a septic count for Jefferson on its own and this page does not estimate one.
Jefferson is a city in Marion County, Oregon. The Census Bureau puts its internal point at 44.716554, -123.005969 and its land area at 0.86 square miles. Septic permitting and record keeping happen at the county level, not the city level, which is why every figure below is attributed to the county and linked back to the county page it came from.
| County | Records we hold | Parcels on septic | Parcels on sewer | County records portal | Searchable without an account |
|---|---|---|---|---|---|
| Marion County | 940 | 9,485 | 81,359 | county portal | account or login required |
Our collection for Marion County, Oregon is small, at 940 septic records. Treat it as a starting point for a Jefferson property rather than a search that settles the question. The county is predominantly sewered: only 9,485 of 90,844 classified parcels are on septic. Septic properties near Jefferson are the exception, which is exactly why owners often do not know they have one. The county publishes a records portal, but reaching the documents needs an account or a login, so budget for that step rather than expecting an open search.
Septic is one subject with very different jobs inside it. These go straight to the page that does yours.
| If you are a | Go to | Because it covers |
|---|---|---|
| Homeowner | Septic pumping in Jefferson | keeping the system you have working |
| Buyer or seller | Buying or selling in Jefferson | what to pull and check before closing |
| Realtor | Buying or selling in Jefferson | the same records a seller needs on file |
| Designer or engineer | Septic design in Jefferson | design flow, tank capacity, dispersal sizing |
| Installer or contractor | Septic installation in Jefferson | site evaluation, permit sequence, inspection |
| Septic pumper | Septic pumping in Jefferson | tank access, lids and service interval |
| Inspector | Septic inspection in Jefferson | what gets checked and what a failure means |
| Land investor | Septic installation in Jefferson | whether raw land can take a system at all |
No. We measure septic and sewer at parcel level and roll it up by county. In Marion County, Oregon, which covers Jefferson, we have measured 9,485 parcels on septic and 81,359 on sewer. That is a county measurement. We do not hold a septic count for Jefferson on its own and this page does not estimate one.
Jefferson is in Marion County, Oregon.
From the Census ZCTA-to-place relationship file, with the share of Jefferson’s land area that falls in each. A ZIP is not a place boundary and the two only ever partly agree, which is exactly why both pages exist.
Straight-line distance from the Census internal point of Jefferson.
Parcel Perfect generates a code-shaped septic design and as-built style drawing for a parcel from the records and site data we hold, and shows every parcel we have classified as septic or sewer on one map. Both are open to use for any parcel in Marion County, Oregon.