Mayfield Colony is a community in Clark County, South Dakota, home to about 77 people across 0.3 square miles. It has no ZIP code of its own: it’s part of 57278.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Population over time
It’s the 332nd largest of 440 towns in South Dakota by population.
Clark County grew from 6,942 residents in 1900 to 3,837 in 2020.
Clark County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Weather by month
Average highs peak around 82°F in summer, and winter lows average 4°F. About 24.2 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Clark, SD weather station (18 miles away).
Jobs in Clark County
738 jobs at 125 businesses in Clark County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
Health care
Nearest hospitals
Avera De Smet Memorial Hospital - CahCritical access hospital · emergency room · De Smet17.5 miles
Huron Regional Medical CenterCritical access hospital · emergency room · CMS rating 2 of 5 · Huron32.2 miles
Prairie Lakes Healthcare System, INCGeneral hospital · emergency room · CMS rating 3 of 5 · Watertown33.5 miles
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances.
Schools in Mayfield Colony
Public schools here are run by Willow Lake School District 12-3. Check each district’s attendance zones for a specific address.
Public schools(4)
School
Grades
Students
Type
Distance
Willow Lake Elementary - 02Willow Lake
Pre-K–5
153
Public
1.9 mi
Mayfield Colony Elementary - 04Willow Lake
K–8
31
Public
6.8 mi
Willow Lake Middle School - 03Willow Lake
6–8
54
Public
1.9 mi
Willow Lake High School - 01Willow Lake
9–12
69
Public
1.9 mi
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.