ZIP Code 51433 - Auburn Iowa
Overview
ZIP Code 51433 is located in Auburn Iowa. Portions of 51433 are also in Yetter and Sac Township and Elm Grove Township (Calhoun County) and Coon Valley Township and Jackson Township (Calhoun County). 51433 is primarily within Sac County, with some portions in Calhoun County. Regionally, 51433 is located in the Sioux City Area.
ZIP Code 51433 Quick Stats
| ZIP Code Name | Auburn |
| Primary County | Sac County |
| ZIP Code Type | Standard |
| Population (2022) | 606 |
| Area Code(s) | 712 |
| Current Time | CDT |
ZIP Code 51433 Map
51433 Demographics
51433 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 51433 is White. The current unemployment level in 51433 is 3.3%.
| Population | 606 |
| Population Growth Rate | 34.67% |
| Population Density | 11 People per Square Mile |
| Total Households | 255 |
| Median Household Income (2021) | $48,958 |
| Average Adjusted Gross Income (2021) | $146,380 |
| Current Unemployment Rate (May 2026) | 3.3% |
| Sales Tax Rate (2025) | 7% |
| Majority Race/Ethnicity | White - 98.05% |
51433 Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|---|---|
| White | 603 | 98.05% |
| Black | 0 | 0% |
| Hispanic | 12 | 1.95% |
| Asian | 0 | 0% |
| Native American | 0 | 0% |
| Hawaiian/Pac. Islander | 0 | 0% |
51433 Educational Attainment Levels
| Highest Education Level | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 45 | 11.08% |
| Bachelor Degree | 17 | 4.19% |
| High School Diploma | 206 | 50.74% |
| No High School Diploma | 19 | 4.68% |
| GED or Alternate | 22 | 5.42% |
| 1 or More Years of College | 71 | 17.49% |
| Associates Degree | 15 | 3.69% |
| Masters Degree | 10 | 2.46% |
| Professional Degree | 0 | 0% |
| Doctorate Degree | 1 | 0.25% |
51433 Geography
| Coordinates | 42.27593994, -94.8722229 |
| Adjacent ZIP Codes | |
| Cities/Towns in 51433 | |
| Regions | Sioux City Area Des Moines-Ames Area |
| Time Zone | Central Daylight Time |
| IANA Timezone | America/Chicago |
| Area | 55 Square Miles |
51433 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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