Worth County, IA ZIP codes
There are 7 ZIP codes in Worth County, IA, in 7 towns, from 50434 to 50459. The largest are 50459 (Northwood), 50456 (Manly) and 50448 (Kensett). 1 more crosses into it from a neighbouring county: 50450.
The county seat is Northwood.
- ZIP codes
- 7
- Partly in it
- 1 more
- Towns
- 7
- County seat
- Northwood
- County FIPS
19195- State
- Iowa
- Population
- 7,350
- Median household income
- $78,008
- Land area
- 400 sq mi
- Metro area
- Mason City
Worth County ZIP codes by town
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.
ZIP codes partly in Worth County
This ZIP code lies mostly in a neighbouring county but covers a twentieth or more of Worth County.
- 50450 Lake Mills · mostly in Winnebago County
Map of Worth County ZIP codes
The ZIP codes of Worth 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.
Worth County in numbers
About 7,350 people live in Worth County, in 3,178 households, the 89th most populous of Iowa's 99 counties. The median household income is $78,008 a year, 4% above the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $145,800 (30% below the Iowa median), and median gross rent is $758 a month. The median age is 44.1; 19.1% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 21 minutes.
| Population | 7,350 |
|---|---|
| Households | 3,178 |
| Median age | 44.1 |
| Median household income | $78,008 |
| Median home value | $145,800 |
| Median gross rent | $758 |
| Bachelor's degree or higher | 19.1% |
| Mean commute | 21.4 min |
| Population density | 18 / 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 Worth County
| Town | ZIP codes | Population |
|---|---|---|
| Northwood | 1 | 2,040 |
| Manly | 1 | 1,320 |
| Grafton | 1 | 271 |
| Kensett | 1 | 270 |
| Fertile | 1 | 255 |
| Hanlontown | 1 | 249 |
| Joice | 1 | 207 |
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 Worth County.
Not sure you are in Worth County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Worth County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
50434 | Fertile , IA | Standard | 396 | — | — |
50440 | Grafton , IA | Standard | 361 | $76,429 | $122,500 |
50444 | Hanlontown , IA | Standard | 394 | $78,214 | $146,900 |
50446 | Joice , IA | Standard | 476 | $107,000 | $154,200 |
50448 | Kensett , IA | Standard | 620 | $62,059 | $123,400 |
50456 | Manly , IA | Standard | 1,699 | $81,339 | $124,700 |
50459 | Northwood , IA | Standard | 3,045 | $71,618 | $149,600 |
Cite this page
zipcodes.pro. “Worth County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ia/county/worth
Underlying data is public domain or openly licensed — sources, vintages and licences.