Madrid Iowa ZIP Codes
Madrid holds a single ZIP code.
Every ZIP code in Madrid
| ZIP code | County |
|---|---|
| 50156 | Boone 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Madrid codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Madrid. 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 Madrid ZIP code begins 501. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 69 ZIP codes, so Madrid accounts for 1% of it.
Every Iowa ZIP prefix and the region it covers →
Area codes covering Madrid
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 Madrid occupies.
Madrid Iowa area codes in full →
Where Madrid's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Madrid
| City | Distance | ZIP codes |
|---|---|---|
| Woodward Iowa ZIP codes | 5.4 mi | 1 ZIP code |
| Luther Iowa ZIP codes | 6.3 mi | 1 ZIP code |
| Sheldahl Iowa ZIP codes | 6.4 mi | 1 ZIP code |
| Slater Iowa ZIP codes | 6.7 mi | 1 ZIP code |
| Polk City Iowa ZIP codes | 8.2 mi | 1 ZIP code |
| Granger Iowa ZIP codes | 8.2 mi | 1 ZIP code |
| Kelley Iowa ZIP codes | 9.5 mi | 1 ZIP code |
| Bouton Iowa ZIP codes | 9.9 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.