ZIP Code 51038 - Merrill Iowa
Overview
ZIP Code 51038 is located in Merrill Iowa. Portions of 51038 are also in Plymouth Township and Liberty Township (Plymouth County) and Stanton Township and Johnson Township (Plymouth County) and Washington Township (Plymouth County). 51038 is entirely within Plymouth County. Regionally, 51038 is located in the Sioux City Area.
ZIP Code 51038 Quick Stats
| ZIP Code Name | Merrill |
| Primary County | Plymouth County |
| ZIP Code Type | Standard |
| Population (2022) | 1,763 |
| Area Code(s) | 712 |
| Current Time | CDT |
ZIP Code 51038 Map
51038 Demographics
51038 can be classified socioeconomically as 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 51038 is White. The current unemployment level in 51038 is 3.3%.
| Population | 1,763 |
| Population Growth Rate | 18.03% |
| Population Density | 23 People per Square Mile |
| Total Households | 637 |
| Median Household Income (2021) | $86,509 |
| Average Adjusted Gross Income (2021) | $294,030 |
| Current Unemployment Rate (May 2026) | 3.3% |
| Sales Tax Rate (2025) | 7% |
| Majority Race/Ethnicity | White - 95.96% |
51038 Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|---|---|
| White | 1,830 | 95.96% |
| Black | 12 | 0.63% |
| Hispanic | 45 | 2.36% |
| Asian | 20 | 1.05% |
| Native American | 0 | 0% |
| Hawaiian/Pac. Islander | 0 | 0% |
51038 Educational Attainment Levels
| Highest Education Level | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 127 | 11.76% |
| Bachelor Degree | 166 | 15.37% |
| High School Diploma | 478 | 44.26% |
| No High School Diploma | 11 | 1.02% |
| GED or Alternate | 21 | 1.94% |
| 1 or More Years of College | 140 | 12.96% |
| Associates Degree | 96 | 8.89% |
| Masters Degree | 41 | 3.8% |
| Professional Degree | 0 | 0% |
| Doctorate Degree | 0 | 0% |
51038 Geography
| Coordinates | 42.70228195, -96.30094147 |
| Adjacent ZIP Codes | |
| Cities/Towns in 51038 | |
| Region | Sioux City Area |
| Time Zone | Central Daylight Time |
| IANA Timezone | America/Chicago |
| Area | 78 Square Miles |
51038 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 | 47a - Loess Prairies | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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