ZIP Code 50531 - Dolliver Iowa
Overview
ZIP Code 50531 is located in Dolliver Iowa. Portions of 50531 are also in Lincoln Township (Emmet County) and Swan Lake Township (Emmet County) and Armstrong Grove Township and Iowa Lake Township and Ellsworth Township (Emmet County). 50531 is entirely within Emmet County. Regionally, 50531 is located in the Sioux City Area.
ZIP Code 50531 Quick Stats
| ZIP Code Name | Dolliver |
| Primary County | Emmet County |
| ZIP Code Type | Standard |
| Population (2022) | 232 |
| Area Code(s) | 712 |
| Current Time | CDT |
ZIP Code 50531 Map
50531 Demographics
50531 can be classified socioeconomically as Lower Middle Class class compared to other ZIP Codes in Iowa based on Median Household Income and Average Adjusted Gross Income. The majority race/ethnicity residing in 50531 is White. The current unemployment level in 50531 is 3.3%.
| Population | 232 |
| Population Growth Rate | -11.91% |
| Population Density | 6 People per Square Mile |
| Total Households | 126 |
| Percentage High Income Households | 16.7% |
| Median Household Income (2021) | $56,458 |
| Average Adjusted Gross Income (2021) | $230,400 |
| Current Unemployment Rate (May 2026) | 3.3% |
| Sales Tax Rate (2025) | 7% |
| Majority Race/Ethnicity | White - 100% |
50531 Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|---|---|
| White | 207 | 100% |
| Black | 0 | 0% |
| Hispanic | 0 | 0% |
| Asian | 0 | 0% |
| Native American | 0 | 0% |
| Hawaiian/Pac. Islander | 0 | 0% |
50531 Educational Attainment Levels
| Highest Education Level | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 15 | 7.54% |
| Bachelor Degree | 13 | 6.53% |
| High School Diploma | 129 | 64.82% |
| No High School Diploma | 0 | 0% |
| GED or Alternate | 0 | 0% |
| 1 or More Years of College | 14 | 7.04% |
| Associates Degree | 20 | 10.05% |
| Masters Degree | 1 | 0.5% |
| Professional Degree | 7 | 3.52% |
| Doctorate Degree | 0 | 0% |
50531 Geography
| Coordinates | 43.45949173, -94.61279297 |
| Adjacent ZIP Codes | |
| Cities/Towns in 50531 | |
| Region | Sioux City Area |
| Time Zone | Central Daylight Time |
| IANA Timezone | America/Chicago |
| Area | 38 Square Miles |
50531 Weather and Climate Data
| 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 | 47b - Des Moines Lobe | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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