Worth County, Iowa ZIP codes
7 ZIP codes are in Worth County, plus 3 that cross in from neighboring counties. It's part of the Mason City, IA micro area.
- ZIP codes
- 7
- Population in these ZIPs
- 6,991
- Avg. median income
- $76,400population-weighted
- Cities & towns
- 7
Click anywhere on the map to see which ZIP code it's in.
ZIP codes in Worth County
| ZIP code | City | Population | Median income | Typical home value |
|---|---|---|---|---|
| 50434 | Fertile | 396 | — | $179,400 |
| 50440 | Grafton | 361 | $76,429 | $181,500 |
| 50444 | Hanlontown | 394 | $78,214 | $208,500 |
| 50446 | Joice | 476 | $107,000 | $204,000 |
| 50448 | Kensett | 620 | $62,059 | $183,200 |
| 50456 | Manly | 1,699 | $81,339 | $152,800 |
| 50459 | Northwood | 3,045 | $71,618 | $204,400 |
ZIP codes partly in Worth County
These ZIP codes are mostly in a neighboring county but cover part of Worth County.
| ZIP code | City | County | Population | Median income | Typical home value |
|---|---|---|---|---|---|
| 50450 | Lake Mills | Winnebago County | 2,952 | $76,125 | $172,300 |
| 50464 | Plymouth | Cerro Gordo County | 694 | $91,750 | $199,400 |
| 50472 | Saint Ansgar | Mitchell County | 2,560 | $93,482 | $249,500 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities and towns in Worth County
Nearby counties
Frequently asked questions
How many ZIP codes are in Worth County, Iowa?
7 ZIP codes are mainly in Worth County, and 3 more ZIP codes from neighboring areas reach partly into it.
What cities are in Worth County?
ZIP codes in Worth County use the city names Fertile, Grafton, Hanlontown, Joice, Kensett, Manly and Northwood.
What metro area is Worth County in?
Worth County is part of the Mason City, IA micropolitan statistical area.