| ZIP Code | 50440 |
| ZIP Code Name | Grafton |
| Primary County | Worth County |
| ZIP Code Type | Standard |
| Population (2021) | 373 |
| Area Code(s) | 641 |
| Current Time | CDT |
50440 is a United States ZIP Code located in Grafton Iowa. Portions of 50440 are also in Union Township (Worth County) and Barton Township. 50440 is entirely within Worth County. 50440 is within the Rochester-Mason City-Austin Area.
50440 can be classified socioeconically as a Middle Class class zipcode in comparison to other zipcodes in Iowa based on Median Household Income and Average Adjusted Gross Income. Measuring level of educational attainment the majority of adults in 50440 have at least a High School Diploma. The majority race/ethnicity residing in 50440 is White. The current unemployment level in 50440 is 2.8%.
| Population | 373 |
| Population Growth Rate | -37.94% |
| Population Density | 12 People per Square Mile |
| Total Households | 186 |
| Percentage High Income Households | 5.4% |
| Median Houshold Income (2021) | $87,500 |
| Average Adjusted Gross Income (2019) | $51,420 |
| Current Unemployment Rate (August 2023) | 2.8% |
| Majority Race/Ethnicty | White - 100.00% |
| Race/Ethnicty | Total | Percentage |
|---|---|---|
| White | 373 | 100% |
| Black | 0 | 0% |
| Hispanic | 0 | 0% |
| Asian | 0 | 0% |
| Native American | 0 | 0% |
| Hawaiian/Pac. Islander | 0 | 0% |
| Highest Education Level Attained | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 38 | 13.67% |
| Bachelor Degree | 46 | 16.55% |
| High School Diploma | 84 | 30.22% |
| No High School Diploma | 1 | 0.36% |
| GED or Alternate | 9 | 3.24% |
| 1 or More Years of College | 63 | 22.66% |
| Associates Degree | 30 | 10.79% |
| Masters Degree | 1 | 0.36% |
| Professional Degree | 0 | 0% |
| Doctorate Degree | 0 | 0% |
| Coordinates | 43.32700348,-93.07340240 |
| Adjacent ZIP Codes | |
| Cities/Towns in 50440 | |
| Region | Rochester-Mason City-Austin Area |
| Metropolitan/Micropolitan Stat Area | Mason City, IA |
| Time Zone | Central Daylight Time |
| IANA Timezone | America/Chicago |
| Area | 30 Square Miles |
| US Congressional Districts in 50440 | |
| Iowa State Senate Districts in 50440 | |
| Iowa State House of Representatives Districts in 50440 |
| School Districts in 50440 |
| Plant Hardiness Zone | Zone 5a: -20F to -15F | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average First Frost Date | October 1 - 10 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average Last Frost Date | May 1 - 10 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Koppen-Geiger Climate Zone | Dfa - Humid Continental Hot Summers | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ecoregion | 47c - Iowan Surface | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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