ZIP Code 57650 - Ralph South Dakota
Overview
ZIP Code 57650 is located in Ralph South Dakota. Portions of 57650 are also in North Harding. 57650 is entirely within Harding County. Regionally, 57650 is located in the Rapid City Area.
ZIP Code 57650 Quick Stats
| ZIP Code Name | Ralph |
| Primary County | Harding County |
| ZIP Code Type | Standard |
| Population (2022) | 13 |
| Area Code(s) | 605 |
| Current Time | MDT |
ZIP Code 57650 Map
57650 Demographics
The majority race/ethnicity residing in 57650 is White. The current unemployment level in 57650 is 2.2%.
| Population | 13 |
| Population Growth Rate | 0% |
| Population Density | 0 People per Square Mile |
| Total Households | 38 |
| Current Unemployment Rate (May 2026) | 2.2% |
| Sales Tax Rate (2025) | 4.2% |
| Majority Race/Ethnicity | White - 100% |
57650 Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|---|---|
| White | 14 | 100% |
| Black | 0 | 0% |
| Hispanic | 0 | 0% |
| Asian | 0 | 0% |
| Native American | 0 | 0% |
| Hawaiian/Pac. Islander | 0 | 0% |
57650 Educational Attainment Levels
| Highest Education Level | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 3 | 4.48% |
| Bachelor Degree | 19 | 28.36% |
| High School Diploma | 11 | 16.42% |
| No High School Diploma | 0 | 0% |
| GED or Alternate | 3 | 4.48% |
| 1 or More Years of College | 7 | 10.45% |
| Associates Degree | 6 | 8.96% |
| Masters Degree | 4 | 5.97% |
| Professional Degree | 0 | 0% |
| Doctorate Degree | 14 | 20.9% |
57650 Geography
| Coordinates | 45.85897446, -103.03421021 |
| Adjacent ZIP Codes | |
| Cities/Towns in 57650 | |
| Region | Rapid City Area |
| Time Zone | Mountain Daylight Time |
| IANA Timezone | America/Denver |
| Area | 107 Square Miles |
57650 Schools
| School Districts in 57650 |
57650 Weather and Climate Data
| Plant Hardiness Zone | Zone 4a: -30F to -25F | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average First Frost Date | September 11 - 20 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average Last Frost Date | May 21 - 31 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Koppen-Geiger Climate Zone | BSk - Cold Semi-Arid Climate | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ecoregion | 43a - Missouri Plateau | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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