In Mahaska County, Iowa, which covers Oskaloosa, we have measured 4,239 parcels on septic and 5,779 on sewer. That is a county measurement. We do not hold a septic count for Oskaloosa on its own and this page does not estimate one.
Oskaloosa is a city in Mahaska County, Iowa. The Census Bureau puts its internal point at 41.292209, -92.640854 and its land area at 8.06 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 |
|---|---|---|---|---|---|
| Mahaska County | 122 | 4,239 | 5,779 | county portal | no account needed |
Our collection for Mahaska County, Iowa is small, at 122 septic records. Treat it as a starting point for a Oskaloosa property rather than a search that settles the question. The county is genuinely mixed: 4,239 of 10,018 classified parcels are on septic and the rest are sewered. Which side of that line a Oskaloosa address falls on is worth establishing before anything else. The county publishes a records portal that we were able to search without creating an account, which makes checking a specific parcel something you can do yourself in a few minutes.
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 |
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No. We measure septic and sewer at parcel level and roll it up by county. In Mahaska County, Iowa, which covers Oskaloosa, we have measured 4,239 parcels on septic and 5,779 on sewer. That is a county measurement. We do not hold a septic count for Oskaloosa on its own and this page does not estimate one.
Oskaloosa is in Mahaska County, Iowa.
From the Census ZCTA-to-place relationship file, with the share of Oskaloosa’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 Oskaloosa.
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 Mahaska County, Iowa.