Oskaloosa Iowa ZIP Codes
Oskaloosa holds a single ZIP code.
Every ZIP code in Oskaloosa
| ZIP code | County |
|---|---|
| 52577 | Mahaska County |
We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP. USPS delivery-type products are licensed, and no clean-rights source maps ZIP codes to neighbourhoods — so the Oskaloosa codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Oskaloosa. Source GeoNames US postal codes (2026-07 postal dump) and Census 2024 county Gazetteer (2024 Gazetteer). Updated . ZIP codes are delivery-route groupings, not areas; the boundaries implied by any ZIP map are approximations.
How these codes cluster
Every Oskaloosa ZIP code begins 525. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 50 ZIP codes, so Oskaloosa accounts for 2% of it.
Every Iowa ZIP prefix and the region it covers →
Area codes covering Oskaloosa
ZIP codes and area codes are separate systems — one routes mail, the other routes calls — and they do not share boundaries. The code below serves the same ground Oskaloosa occupies.
Oskaloosa Iowa area codes in full →
Where Oskaloosa's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Oskaloosa
| City | Distance | ZIP codes |
|---|---|---|
| University Park Iowa ZIP codes | 1.4 mi | 1 ZIP code |
| Beacon Iowa ZIP codes | 2.4 mi | 1 ZIP code |
| Leighton Iowa ZIP codes | 8.2 mi | 1 ZIP code |
| Eddyville Iowa ZIP codes | 9.2 mi | 1 ZIP code |
| Rose Hill Iowa ZIP codes | 9.4 mi | 1 ZIP code |
| Fremont Iowa ZIP codes | 12 mi | 1 ZIP code |
| New Sharon Iowa ZIP codes | 12 mi | 1 ZIP code |
| Kirkville Iowa ZIP codes | 13 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.