ZIP Code 57233 - Erwin South Dakota
Overview
ZIP Code 57233 is located in Erwin South Dakota. Portions of 57233 are also in Hartland Township (Kingsbury County) and Erwin (town) and Badger Township (Kingsbury County) and Cleveland Township (Hamlin County). 57233 is primarily within Kingsbury County, with some portions in Hamlin County. Regionally, 57233 is located in the Sioux Falls Area.
ZIP Code 57233 Quick Stats
| ZIP Code Name | Erwin |
| Primary County | Kingsbury County |
| ZIP Code Type | Standard |
| Population (2022) | 257 |
| Area Code(s) | 605 |
| Current Time | CDT |
ZIP Code 57233 Map
57233 Demographics
The majority race/ethnicity residing in 57233 is White. The current unemployment level in 57233 is 2.2%.
| Population | 257 |
| Population Growth Rate | 111.29% |
| Population Density | 6 People per Square Mile |
| Total Households | 77 |
| Current Unemployment Rate (May 2026) | 2.2% |
| Sales Tax Rate (2025) | 6.2% |
| Majority Race/Ethnicity | White - 100% |
57233 Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|---|---|
| White | 262 | 100% |
| Black | 0 | 0% |
| Hispanic | 0 | 0% |
| Asian | 0 | 0% |
| Native American | 0 | 0% |
| Hawaiian/Pac. Islander | 0 | 0% |
57233 Educational Attainment Levels
| Highest Education Level | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 4 | 3.45% |
| Bachelor Degree | 6 | 5.17% |
| High School Diploma | 58 | 50% |
| No High School Diploma | 0 | 0% |
| GED or Alternate | 8 | 6.9% |
| 1 or More Years of College | 12 | 10.34% |
| Associates Degree | 25 | 21.55% |
| Masters Degree | 0 | 0% |
| Professional Degree | 3 | 2.59% |
| Doctorate Degree | 0 | 0% |
57233 Geography
| Coordinates | 44.50868225, -97.39881897 |
| Adjacent ZIP Codes | |
| Cities/Towns in 57233 | |
| Region | Sioux Falls Area |
| Metropolitan/Micropolitan Stat Area | Watertown, SD |
| Time Zone | Central Daylight Time |
| IANA Timezone | America/Chicago |
| Area | 45 Square Miles |
57233 Schools
| School Districts in 57233 | |
| Elementary Schools in 57233 | |
| Middle Schools in 57233 | |
| High Schools in 57233 |
57233 Weather and Climate Data
| Plant Hardiness Zone | Zone 4b: -25F to -20F | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average First Frost Date | September 21 - 31 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average Last Frost Date | May 1 - 10 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Koppen-Geiger Climate Zone | Dfa - Humid Continental Hot Summers | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ecoregion | 46k - Prairie Coteau | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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