ZIP Code 51044 is located in Oto Iowa. Portions of 51044 are also in Oto Township and Grant Township (Woodbury County) and Little Sioux Township (Woodbury County) and Miller Township. 51044 is entirely within Woodbury County. Regionally, 51044 is located in the Sioux City Area.
| ZIP Code Name | Oto |
| Primary County | Woodbury County |
| ZIP Code Type | Standard |
| Population (2022) | 216 |
| Area Code(s) | 712 |
| Current Time | CDT |
51044 can be classified socioeconomically as Lower Middle Class class compared to other ZIP Codes in Iowa. The majority race/ethnicity residing in 51044 is White. The current unemployment level in 51044 is 3.2%.
| Population | 216 |
| Population Growth Rate | 0.00% |
| Population Density | 6 People per Square Mile |
| Total Households | 89 |
| Median Household Income (2021) | $65,625 |
| Current Unemployment Rate (June 2025) | 3.2% |
| Majority Race/Ethnicty | White - 98.28% |
| Race/Ethnicty | Total | Percentage |
|---|---|---|
| White | 229 | 98.28% |
| Black | 0 | 0% |
| Hispanic | 4 | 1.72% |
| Asian | 0 | 0% |
| Native American | 0 | 0% |
| Hawaiian/Pac. Islander | 0 | 0% |
| Highest Education Level Attained | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 18 | 12.68% |
| Bachelor Degree | 20 | 14.08% |
| High School Diploma | 43 | 30.28% |
| No High School Diploma | 0 | 0% |
| GED or Alternate | 22 | 15.49% |
| 1 or More Years of College | 24 | 16.9% |
| Associates Degree | 11 | 7.75% |
| Masters Degree | 4 | 2.82% |
| Professional Degree | 0 | 0% |
| Doctorate Degree | 0 | 0% |
| Coordinates | 42.29307938,-95.90798187 |
| Adjacent ZIP Codes | |
| Cities/Towns in 51044 | |
| Region | Sioux City Area |
| Metropolitan/Micropolitan Stat Area | Sioux City, IA-NE-SD |
| Time Zone | Central Daylight Time |
| IANA Timezone | America/Chicago |
| Area | 35 Square Miles |
| School Districts in 51044 | |
| Elementary Schools in 51044 | |
| Middle Schools in 51044 | |
| High Schools in 51044 |
| 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 | 47m - Western Loess Hills | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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