ZIP Code 57638 is located in Lemmon South Dakota. Portions of 57638 are also in Northeast Perkins and Lincoln Township (Perkins County) and De Witt Township and Castle Butte and Flat Creek Township and Pleasant Valley and Liberty Township (Perkins County) and Barrett Township (Perkins County) and Burdick Township and Rockford Township and Rolling Green Township and Marshfield Township and Trail Township and White Butte Township and Clark Township (Perkins County). 57638 is primarily within Perkins County, with some portions in Corson County. Regionally, 57638 is located in the Rapid City Area.
| ZIP Code Name | Lemmon |
| Primary County | Perkins County |
| ZIP Code Type | Standard |
| Population (2022) | 1,910 |
| Area Code(s) | 605 |
| Current Time | MDT |
57638 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 57638 is White. The majority race/ethnicity attending public schools in 57638 is White. The current unemployment level in 57638 is 2.2%.
| Population | 1,910 |
| Population Growth Rate | 0.00% |
| Population Density | 3 People per Square Mile |
| Total Households | 854 |
| Percentage High Income Households | 3.4% |
| Median Household Income (2021) | $48,750 |
| Average Adjusted Gross Income (2021) | $147,370 |
| Current Unemployment Rate (May 2026) | 2.2% |
| Sales Tax Rate (2025) | 6.2% |
| Majority Race/Ethnicty | White - 94.45% |
| Public School Majority Race/Ethnicty | White - 89.96% |
| Race/Ethnicty | Total | Percentage |
|---|---|---|
| White | 1,701 | 94.45% |
| Black | 0 | 0% |
| Hispanic | 16 | 0.89% |
| Asian | 0 | 0% |
| Native American | 84 | 4.66% |
| Hawaiian/Pac. Islander | 0 | 0% |
| Race/Ethnicty | Total | Percentage |
|---|---|---|
| White | 233 | 92.46% |
| Black | 1 | 0.4% |
| Hispanic | 10 | 3.97% |
| Asian | 0 | 0% |
| Native American | 8 | 3.17% |
| Hawaiian/Pac. Islander | 0 | 0% |
| Highest Education Level Attained | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 107 | 9.01% |
| Bachelor Degree | 210 | 17.68% |
| High School Diploma | 441 | 37.12% |
| No High School Diploma | 25 | 2.1% |
| GED or Alternate | 52 | 4.38% |
| 1 or More Years of College | 212 | 17.85% |
| Associates Degree | 102 | 8.59% |
| Masters Degree | 23 | 1.94% |
| Professional Degree | 16 | 1.35% |
| Doctorate Degree | 0 | 0% |
| Coordinates | 45.78561401,-102.26241302 |
| Adjacent ZIP Codes | |
| Cities/Towns in 57638 | Northeast Perkins, Lincoln Township (Perkins County), De Witt Township, Castle Butte, Flat Creek Township, Pleasant Valley, Liberty Township (Perkins County), Lemmon, Barrett Township (Perkins County), Burdick Township, Rockford Township, Rolling Green Township, Marshfield Township, Trail Township, White Butte Township, Clark Township (Perkins County) |
| Regions | Rapid City AreaMinot-Bismark-Dickinson Area |
| Time Zone | Mountain Daylight Time |
| IANA Timezone | America/Denver |
| Area | 661 Square Miles |
| School Districts in 57638 | |
| Elementary Schools in 57638 | |
| Middle Schools in 57638 | |
| High Schools in 57638 |
| 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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