ZIP Code 57630 - Glencross South Dakota
Overview
ZIP Code 57630 is located in Glencross South Dakota. Portions of 57630 are also in North Dewey. 57630 is entirely within Dewey County. Regionally, 57630 is located in the Sioux Falls Area.
ZIP Code 57630 Quick Stats
| ZIP Code Name | Glencross |
| Primary County | Dewey County |
| ZIP Code Type | Standard |
| Population (2022) | 31 |
| Area Code(s) | 605 |
| Current Time | MDT |
ZIP Code 57630 Map
57630 Demographics
The majority race/ethnicity residing in 57630 is White. The current unemployment level in 57630 is 2.2%.
| Population | 31 |
| Population Growth Rate | -23.26% |
| Population Density | 1 People per Square Mile |
| Total Households | 20 |
| Current Unemployment Rate (May 2026) | 2.2% |
| Sales Tax Rate (2025) | 4.2% |
| Majority Race/Ethnicity | White - 84.85% |
57630 Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|---|---|
| White | 28 | 84.85% |
| Black | 0 | 0% |
| Hispanic | 0 | 0% |
| Asian | 0 | 0% |
| Native American | 5 | 15.15% |
| Hawaiian/Pac. Islander | 0 | 0% |
57630 Educational Attainment Levels
| Highest Education Level | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 0 | 0% |
| Bachelor Degree | 0 | 0% |
| High School Diploma | 23 | 67.65% |
| No High School Diploma | 0 | 0% |
| GED or Alternate | 0 | 0% |
| 1 or More Years of College | 5 | 14.71% |
| Associates Degree | 3 | 8.82% |
| Masters Degree | 3 | 8.82% |
| Professional Degree | 0 | 0% |
| Doctorate Degree | 0 | 0% |
57630 Geography
| Coordinates | 45.43790817, -100.88851929 |
| Adjacent ZIP Codes | |
| Cities/Towns in 57630 | |
| Region | Sioux Falls Area |
| Time Zone | Mountain Daylight Time |
| IANA Timezone | America/Denver |
| Area | 23 Square Miles |
57630 Schools
| School Districts in 57630 | |
| Elementary Schools in 57630 | |
| Middle Schools in 57630 | |
| High Schools in 57630 |
57630 Weather and Climate Data
| Plant Hardiness Zone | Zone 4b: -25F to -20F | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average First Frost Date | September 21 - 31 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average Last Frost Date | May 11 - 20 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Koppen-Geiger Climate Zone | BSk - Cold Semi-Arid Climate | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ecoregion | 43a - Missouri Plateau | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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