ZIP Code 51545 - Little Sioux Iowa
Overview
ZIP Code 51545 is located in Little Sioux Iowa. Portions of 51545 are also in River Sioux and Little Sioux Township (Harrison County) and Jackson Township (Harrison County) and Sherman Township (Monona County). 51545 is primarily within Harrison County, with some portions in Monona County. Regionally, 51545 is located in the Omaha Area.
ZIP Code 51545 Quick Stats
| ZIP Code Name | Little Sioux |
| Primary County | Harrison County |
| ZIP Code Type | Standard |
| Population (2022) | 271 |
| Area Code(s) | 712 |
| Current Time | CDT |
ZIP Code 51545 Map
51545 Demographics
51545 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 51545 is White. The current unemployment level in 51545 is 3.3%.
| Population | 271 |
| Population Growth Rate | -6.03% |
| Population Density | 7 People per Square Mile |
| Total Households | 187 |
| Median Household Income (2021) | $37,250 |
| Average Adjusted Gross Income (2021) | $175,900 |
| Current Unemployment Rate (May 2026) | 3.3% |
| Sales Tax Rate (2025) | 7% |
| Majority Race/Ethnicity | White - 86.25% |
51545 Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|---|---|
| White | 276 | 86.25% |
| Black | 14 | 4.38% |
| Hispanic | 30 | 9.38% |
| Asian | 0 | 0% |
| Native American | 0 | 0% |
| Hawaiian/Pac. Islander | 0 | 0% |
51545 Educational Attainment Levels
| Highest Education Level | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 35 | 12.46% |
| Bachelor Degree | 21 | 7.47% |
| High School Diploma | 128 | 45.55% |
| No High School Diploma | 2 | 0.71% |
| GED or Alternate | 39 | 13.88% |
| 1 or More Years of College | 35 | 12.46% |
| Associates Degree | 21 | 7.47% |
| Masters Degree | 0 | 0% |
| Professional Degree | 0 | 0% |
| Doctorate Degree | 0 | 0% |
51545 Geography
| Coordinates | 41.82607651, -96.04042816 |
| Adjacent ZIP Codes | |
| Cities/Towns in 51545 | |
| Regions | Omaha Area Sioux City Area |
| Metropolitan/Micropolitan Stat Area | Omaha-Council Bluffs, NE-IA |
| Time Zone | Central Daylight Time |
| IANA Timezone | America/Chicago |
| Area | 38 Square Miles |
51545 Weather and Climate Data
| Plant Hardiness Zone | Zone 5a: -20F to -15F | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average First Frost Date | October 1 - 10 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average Last Frost Date | April 21 - 31 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Koppen-Geiger Climate Zone | Dfa - Humid Continental Hot Summers | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ecoregion | 47m - Western Loess Hills | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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