Plainfield Iowa ZIP Codes
Plainfield holds a single ZIP code.
Every ZIP code in Plainfield
| ZIP code | County |
|---|---|
| 50666 | Bremer 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Plainfield codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Plainfield. 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 Plainfield ZIP code begins 506. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 70 ZIP codes, so Plainfield accounts for 1% of it.
Every Iowa ZIP prefix and the region it covers →
Area codes covering Plainfield
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 Plainfield occupies.
Plainfield Iowa area codes in full →
Where Plainfield's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Plainfield
| City | Distance | ZIP codes |
|---|---|---|
| Nashua Iowa ZIP codes | 7.3 mi | 1 ZIP code |
| Clarksville Iowa ZIP codes | 8.1 mi | 1 ZIP code |
| Waverly Iowa ZIP codes | 9.1 mi | 1 ZIP code |
| Shell Rock Iowa ZIP codes | 9.4 mi | 1 ZIP code |
| Frederika Iowa ZIP codes | 12 mi | 1 ZIP code |
| Ionia Iowa ZIP codes | 14 mi | 1 ZIP code |
| Greene Iowa ZIP codes | 14 mi | 1 ZIP code |
| Janesville Iowa ZIP codes | 14 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.