ZIP Code 51010 - Castana Iowa
Overview
ZIP Code 51010 is located in Castana Iowa. Portions of 51010 are also in Kennebec Township and Center Township (Monona County) and Grant Township (Monona County) and Jordan Township and Maple Township (Monona County) and Belvidere Township. 51010 is entirely within Monona County. Regionally, 51010 is located in the Sioux City Area.
ZIP Code 51010 Quick Stats
| ZIP Code Name | Castana |
| Primary County | Monona County |
| ZIP Code Type | Standard |
| Population (2022) | 411 |
| Area Code(s) | 712 |
| Current Time | CDT |
ZIP Code 51010 Map
51010 Demographics
51010 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 51010 is White. The current unemployment level in 51010 is 3.3%.
| Population | 411 |
| Population Growth Rate | 0% |
| Population Density | 5 People per Square Mile |
| Total Households | 179 |
| Median Household Income (2021) | $82,604 |
| Average Adjusted Gross Income (2021) | $177,570 |
| Current Unemployment Rate (May 2026) | 3.3% |
| Sales Tax Rate (2025) | 7% |
| Majority Race/Ethnicity | White - 100% |
51010 Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|---|---|
| White | 431 | 100% |
| Black | 0 | 0% |
| Hispanic | 0 | 0% |
| Asian | 0 | 0% |
| Native American | 0 | 0% |
| Hawaiian/Pac. Islander | 0 | 0% |
51010 Educational Attainment Levels
| Highest Education Level | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 52 | 24.19% |
| Bachelor Degree | 11 | 5.12% |
| High School Diploma | 60 | 27.91% |
| No High School Diploma | 18 | 8.37% |
| GED or Alternate | 23 | 10.7% |
| 1 or More Years of College | 29 | 13.49% |
| Associates Degree | 21 | 9.77% |
| Masters Degree | 1 | 0.47% |
| Professional Degree | 0 | 0% |
| Doctorate Degree | 0 | 0% |
51010 Geography
| Coordinates | 42.09479141, -95.91690063 |
| Adjacent ZIP Codes | |
| Cities/Towns in 51010 | |
| Region | Sioux City Area |
| Time Zone | Central Daylight Time |
| IANA Timezone | America/Chicago |
| Area | 77 Square Miles |
51010 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 | 47m - Western Loess Hills | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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