Winnebago County, IA ZIP codes
There are 7 ZIP codes in Winnebago County, IA, in 7 towns, from 50424 to 50478. The largest are 50436 (Forest City), 50450 (Lake Mills) and 50424 (Buffalo Center).
The county seat is Forest City.
- ZIP codes
- 7
- Towns
- 7
- County seat
- Forest City
- County FIPS
19189- State
- Iowa
- Population
- 10,583
- Median household income
- $67,642
- Land area
- 400 sq mi
Winnebago County ZIP codes by town
- Forest City (county seat)
- 50436
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Winnebago County ZIP codes
The ZIP codes of Winnebago County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Winnebago County in numbers
About 10,583 people live in Winnebago County, in 4,641 households, the 70th most populous of Iowa's 99 counties. The median household income is $67,642 a year, 10% below the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $135,000 (35% below the Iowa median), and median gross rent is $717 a month. The median age is 42.7; 26.1% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 15 minutes.
| Population | 10,583 |
|---|---|
| Households | 4,641 |
| Median age | 42.7 |
| Median household income | $67,642 |
| Median home value | $135,000 |
| Median gross rent | $717 |
| Bachelor's degree or higher | 26.1% |
| Mean commute | 14.7 min |
| Population density | 26 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Winnebago County
| Town | ZIP codes | Population |
|---|---|---|
| Forest City | 1 | 4,290 |
| Lake Mills | 1 | 2,088 |
| Buffalo Center | 1 | 911 |
| Thompson | 1 | 459 |
| Leland | 1 | 306 |
| Rake | 1 | 190 |
| Scarville | 1 | 66 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Winnebago County.
Not sure you are in Winnebago County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Winnebago County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
50424 | Buffalo Center , IA | Standard | 1,441 | $59,091 | $114,500 |
50436 | Forest City , IA | Standard | 5,771 | $74,940 | $167,900 |
50450 | Lake Mills , IA | Standard | 2,952 | $76,125 | $158,000 |
50453 | Leland , IA | Standard | 537 | $77,868 | $153,600 |
50465 | Rake , IA | Standard | 190 | $42,386 | $49,000 |
50473 | Scarville , IA | Standard | 219 | $50,227 | $140,500 |
50478 | Thompson , IA | Standard | 737 | $48,750 | $93,200 |
Cite this page
zipcodes.pro. “Winnebago County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ia/county/winnebago
Underlying data is public domain or openly licensed — sources, vintages and licences.