Lake Mills Iowa ZIP Codes
Lake Mills holds a single ZIP code.
Every ZIP code in Lake Mills
| ZIP code | County |
|---|---|
| 50450 | Winnebago 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We do not publish a delivery type (standard, PO box, unique) or a neighbourhood for each ZIP.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 Lake Mills codes above are listed without a column we would have to invent.
Scope every ZIP code recorded for Lake Mills. 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 Lake Mills ZIP code begins 504. Those first three digits identify the sectional center facility that processes mail for this part of Iowa. Statewide that range covers 57 ZIP codes, so Lake Mills accounts for 2% of it.
Every Iowa ZIP prefix and the region it covers →
Area codes covering Lake Mills
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 Lake Mills occupies.
Lake Mills Iowa area codes in full →
Where Lake Mills's ZIP codes sit
- Reference points and footprint
- Not an official NANPA boundary
- Not a USPS delivery area
Cities near Lake Mills
| City | Distance | ZIP codes |
|---|---|---|
| Joice Iowa ZIP codes | 5.2 mi | 1 ZIP code |
| Scarville Iowa ZIP codes | 5.7 mi | 1 ZIP code |
| Leland Iowa ZIP codes | 7.6 mi | 1 ZIP code |
| Fertile Iowa ZIP codes | 12 mi | 1 ZIP code |
| Hanlontown Iowa ZIP codes | 12 mi | 1 ZIP code |
| Forest City Iowa ZIP codes | 12 mi | 1 ZIP code |
| Thompson Iowa ZIP codes | 13 mi | 1 ZIP code |
| Northwood Iowa ZIP codes | 16 mi | 1 ZIP code |
Straight-line distance between place reference points, not driving distance.