ZIP Code 57266 - Summit South Dakota
Overview
ZIP Code 57266 is located in Summit South Dakota. Portions of 57266 are also in Spring Grove Township and Summit Township (Roberts County) and Farmington Township (Grant County) and Lura Township and Blooming Valley Township and Summit (town) and Mazeppa Township and Ortley Township and Osceola Township (Grant County). 57266 is primarily within Roberts County, with some portions in Grant County. Regionally, 57266 is located in the Sioux Falls Area.
ZIP Code 57266 Quick Stats
| ZIP Code Name | Summit |
| Primary County | Roberts County |
| ZIP Code Type | Standard |
| Population (2022) | 571 |
| Area Code(s) | 605 |
| Current Time | CDT |
ZIP Code 57266 Map
57266 Demographics
57266 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 57266 is White. The majority race/ethnicity attending public schools in 57266 is White. The current unemployment level in 57266 is 2.2%.
| Population | 571 |
| Population Growth Rate | -8.04% |
| Population Density | 5 People per Square Mile |
| Total Households | 213 |
| Median Household Income (2021) | $57,083 |
| Average Adjusted Gross Income (2021) | $160,300 |
| Current Unemployment Rate (May 2026) | 2.2% |
| Sales Tax Rate (2025) | 6.2% |
| Majority Race/Ethnicity | White - 74.53% |
| Public School Majority Race/Ethnicity | White - 70.97% |
57266 Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|---|---|
| White | 436 | 74.53% |
| Black | 2 | 0.34% |
| Hispanic | 51 | 8.72% |
| Asian | 0 | 0% |
| Native American | 96 | 16.41% |
| Hawaiian/Pac. Islander | 0 | 0% |
57266 Public School Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|---|---|
| White | 132 | 76.74% |
| Black | 2 | 1.16% |
| Hispanic | 9 | 5.23% |
| Asian | 0 | 0% |
| Native American | 29 | 16.86% |
| Hawaiian/Pac. Islander | 0 | 0% |
57266 Educational Attainment Levels
| Highest Education Level | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 21 | 7.07% |
| Bachelor Degree | 45 | 15.15% |
| High School Diploma | 86 | 28.96% |
| No High School Diploma | 14 | 4.71% |
| GED or Alternate | 13 | 4.38% |
| 1 or More Years of College | 71 | 23.91% |
| Associates Degree | 28 | 9.43% |
| Masters Degree | 16 | 5.39% |
| Professional Degree | 3 | 1.01% |
| Doctorate Degree | 0 | 0% |
57266 Geography
| Coordinates | 45.30818939, -97.07220459 |
| Adjacent ZIP Codes | |
| Cities/Towns in 57266 | |
| Region | Sioux Falls Area |
| Time Zone | Central Daylight Time |
| IANA Timezone | America/Chicago |
| Area | 119 Square Miles |
57266 Schools
| School Districts in 57266 | |
| Elementary Schools in 57266 | |
| Middle Schools in 57266 | |
| High Schools in 57266 |
57266 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 | 46k - Prairie Coteau | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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