ZIP Code 57421 is located in Amherst South Dakota. Portions of 57421 are also in Newport Colony and Weston Township and Stena Township. 57421 is entirely within Marshall County. Regionally, it is located in the Sioux Falls Area.
| ZIP Code Name | Amherst |
| Primary County | Marshall County |
| ZIP Code Type | Standard |
| Population (2022) | 54 |
| Area Code(s) | 605 |
| Current Time | CDT |
| Population | 54 |
| Population Growth Rate | 35.21% |
| Population Density | 2 People per Square Mile |
| Total Households | 32 |
| Current Unemployment Rate (April 2024) | 3.8% |
| Majority Race/Ethnicty | White - 100.00% |
| Race/Ethnicty | Total | Percentage |
|---|---|---|
| White | 96 | 100% |
| Black | 0 | 0% |
| Hispanic | 0 | 0% |
| Asian | 0 | 0% |
| Native American | 0 | 0% |
| Hawaiian/Pac. Islander | 0 | 0% |
| Highest Education Level Attained | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 0 | 0% |
| Bachelor Degree | 0 | 0% |
| High School Diploma | 28 | 87.5% |
| No High School Diploma | 0 | 0% |
| GED or Alternate | 0 | 0% |
| 1 or More Years of College | 0 | 0% |
| Associates Degree | 4 | 12.5% |
| Masters Degree | 0 | 0% |
| Professional Degree | 0 | 0% |
| Doctorate Degree | 0 | 0% |
| Coordinates | 45.73032761,-97.90296936 |
| Adjacent ZIP Codes | |
| Cities/Towns in 57421 | |
| Region | Sioux Falls Area |
| Time Zone | Central Daylight Time |
| IANA Timezone | America/Chicago |
| Area | 29 Square Miles |
| South Dakota State Senate Districts in 57421 | |
| South Dakota State House of Representatives Districts in 57421 |
| School Districts in 57421 |
| 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 | 46c - Glacial Lake Basins | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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