ZIP Code 57481 - Westport South Dakota
Overview
ZIP Code 57481 is located in Westport South Dakota. Portions of 57481 are also in Grassland Colony and Long Lake Colony and Wetonka and Central McPherson and Westport Township and Carlisle Township and Pembrook Township and Oneota Township and Franklyn Township and Lincoln Township (Brown County) and Brainard Township and Garland Township and Westport (town) and Carl Township and Wetonka (town). 57481 is primarily within Brown County, with some portions in Mcpherson County and Edmunds County. Regionally, 57481 is located in the Sioux Falls Area.
ZIP Code 57481 Quick Stats
| ZIP Code Name | Westport |
| Primary County | Brown County |
| ZIP Code Type | Standard |
| Population (2022) | 375 |
| Area Code(s) | 605 |
| Current Time | CDT |
ZIP Code 57481 Map
57481 Demographics
57481 can be classified socioeconomically as Lower Middle Class class compared to other ZIP Codes in South Dakota based on Median Household Income and Average Adjusted Gross Income. The majority race/ethnicity residing in 57481 is White. The majority race/ethnicity attending public schools in 57481 is White. The current unemployment level in 57481 is 2.2%.
| Population | 375 |
| Population Growth Rate | -25.35% |
| Population Density | 2 People per Square Mile |
| Total Households | 136 |
| Median Household Income (2021) | $65,438 |
| Average Adjusted Gross Income (2021) | $163,330 |
| Current Unemployment Rate (May 2026) | 2.2% |
| Sales Tax Rate (2025) | 6.2% |
| Majority Race/Ethnicity | White - 100% |
| Public School Majority Race/Ethnicity | White - 100% |
57481 Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|---|---|
| White | 407 | 100% |
| Black | 0 | 0% |
| Hispanic | 0 | 0% |
| Asian | 0 | 0% |
| Native American | 0 | 0% |
| Hawaiian/Pac. Islander | 0 | 0% |
57481 Public School Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|---|---|
| White | 48 | 100% |
| Black | 0 | 0% |
| Hispanic | 0 | 0% |
| Asian | 0 | 0% |
| Native American | 0 | 0% |
| Hawaiian/Pac. Islander | 0 | 0% |
57481 Educational Attainment Levels
| Highest Education Level | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 7 | 2.75% |
| Bachelor Degree | 72 | 28.24% |
| High School Diploma | 95 | 37.25% |
| No High School Diploma | 23 | 9.02% |
| GED or Alternate | 5 | 1.96% |
| 1 or More Years of College | 34 | 13.33% |
| Associates Degree | 14 | 5.49% |
| Masters Degree | 3 | 1.18% |
| Professional Degree | 2 | 0.78% |
| Doctorate Degree | 0 | 0% |
57481 Geography
| Coordinates | 45.65227509, -98.66873932 |
| Adjacent ZIP Codes | |
| Cities/Towns in 57481 | |
| Region | Sioux Falls Area |
| Metropolitan/Micropolitan Stat Area | Aberdeen, SD |
| Time Zone | Central Daylight Time |
| IANA Timezone | America/Chicago |
| Area | 198 Square Miles |
57481 Schools
| School Districts in 57481 | |
| Elementary Schools in 57481 | |
| Middle Schools in 57481 | |
| High Schools in 57481 |
57481 Weather and Climate Data
| Plant Hardiness Zone | Zone 4a: -30F to -25F | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average First Frost Date | September 21 - 31 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average Last Frost Date | May 11 - 20 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Koppen-Geiger Climate Zone | Dfb - Humid Continental Mild Summer, Wet All Year | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ecoregion | 46i - Drift Plains | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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