ZIP Code 57645 - Morristown South Dakota
Overview
ZIP Code 57645 is located in Morristown South Dakota. Portions of 57645 are also in West Corson and Custer Township (Corson County) and Morristown (town). 57645 is entirely within Corson County. Regionally, 57645 is located in the Minot-Bismark-Dickinson Area.
ZIP Code 57645 Quick Stats
| ZIP Code Name | Morristown |
| Primary County | Corson County |
| ZIP Code Type | Standard |
| Population (2022) | 142 |
| Area Code(s) | 605 |
| Current Time | MDT |
ZIP Code 57645 Map
57645 Demographics
57645 can be classified socioeconomically as Lower Middle Class class compared to other ZIP Codes in South Dakota. The majority race/ethnicity residing in 57645 is White. The current unemployment level in 57645 is 2.2%.
| Population | 142 |
| Population Growth Rate | -42.27% |
| Population Density | 2 People per Square Mile |
| Total Households | 107 |
| Median Household Income (2021) | $40,938 |
| Current Unemployment Rate (May 2026) | 2.2% |
| Sales Tax Rate (2025) | 5.7% |
| Majority Race/Ethnicity | White - 86.29% |
57645 Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|---|---|
| White | 107 | 86.29% |
| Black | 0 | 0% |
| Hispanic | 0 | 0% |
| Asian | 0 | 0% |
| Native American | 17 | 13.71% |
| Hawaiian/Pac. Islander | 0 | 0% |
57645 Educational Attainment Levels
| Highest Education Level | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 13 | 8.61% |
| Bachelor Degree | 21 | 13.91% |
| High School Diploma | 73 | 48.34% |
| No High School Diploma | 0 | 0% |
| GED or Alternate | 4 | 2.65% |
| 1 or More Years of College | 26 | 17.22% |
| Associates Degree | 12 | 7.95% |
| Masters Degree | 2 | 1.32% |
| Professional Degree | 0 | 0% |
| Doctorate Degree | 0 | 0% |
57645 Geography
| Coordinates | 45.84638977, -101.71453094 |
| Adjacent ZIP Codes | |
| Cities/Towns in 57645 | |
| Region | Minot-Bismark-Dickinson Area |
| Time Zone | Mountain Daylight Time |
| IANA Timezone | America/Denver |
| Area | 85 Square Miles |
57645 Schools
| School Districts in 57645 | |
| Elementary Schools in 57645 | |
| Middle Schools in 57645 | |
| High Schools in 57645 |
57645 Weather and Climate Data
| Plant Hardiness Zone | Zone 4a: -30F to -25F | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average First Frost Date | September 11 - 20 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average Last Frost Date | May 11 - 20 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Koppen-Geiger Climate Zone | BSk - Cold Semi-Arid Climate | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ecoregion | 43a - Missouri Plateau | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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