Grenville, South Dakota Demographics & Population 2026
During the 2020–2024 ACS period, Grenville, South Dakota had a total population of 53, the 372nd largest town in South Dakota, with a median household income of $90,385, which is 20% higher than the state average. The poverty rate is 5.7%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Housing is very affordable with a home-value-to-income ratio of just 0.5x.
Grenville Quick Facts
How Grenville Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 70 | 53 | -24.3% |
| Median household income | $83,125 | $90,385 | +8.7% |
| Median home value | $43,100 | $41,400 | -3.9% |
How Grenville Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
A less diverse community where one racial or ethnic group represents a large majority.
State average: 35 | National average: 61
Education
Educational Attainment (Adults 25+)
Grenville Rankings in South Dakota
Explore South Dakota Rankings
Other Cities in Day County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Webster | 1,896 | $55,179 | 15.1% | $154,100 |
| Waubay | 337 | $36,389 | 24.3% | $152,800 |
| Enemy Swim | 301 | $30,357 | 69.4% | $85,800 |
| Bristol | 275 | $56,250 | 8.3% | $76,400 |
| Pierpont | 161 | $92,500 | 13.8% | $75,000 |
| Roslyn | 147 | $49,375 | 15.0% | $96,300 |
| Andover | 31 | $68,333 | 9.7% | $57,500 |
| Butler | 2 | N/A | 0.0% | N/A |
Cities Similar to Grenville
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Evergreen Colony | 55 | N/A | N/A | 100.0% | 100.0% |
| Oral | 55 | N/A | N/A | 63.6% | 12.7% |
| Brentwood Colony | 57 | N/A | N/A | N/A | 100.0% |
| Ward | 52 | $76,875 | $151,300 | 41.5% | 0.0% |
| Millbrook Colony | 47 | N/A | N/A | 0.0% | 57.5% |
A note before these figures: with a population of 53, Grenville's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.
Population Overview
Grenville is a small community located in South Dakota, within Day County. The total population is 53. It ranks as the 372nd most populous out of 439 Census-designated places in South Dakota.
Age Demographics
The median age in Grenville is 57.8 years. This is 52% higher than the state median of 38.0 years.
Economy, Income & Housing
The median household income in Grenville is $90,385. This is 20% higher than the state median of $75,081. It is also 12% higher than the national median of $80,734. The poverty rate stands at 5.7%. This is 53% lower than the state poverty rate of 11.9%. The survey records no unemployed residents in Grenville, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $41,400. Housing costs are 84% lower than the state median of $257,400. With a home-value-to-income ratio of just 0.5x, Grenville is one of the most affordable housing markets in the area. 93.3% of occupied housing units are owner-occupied. This homeownership rate is 36% higher than the state average of 68.6%.
Race & Ethnicity
Grenville has a predominantly White (non-Hispanic) population, comprising 94.3% of all residents. Hispanic or Latino residents account for 5.7%.
Education
13.2% of residents aged 25 and older hold a bachelor's degree or higher. This is 59% lower than the state rate of 31.9%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 92.5%.
Data Sources & Methodology
All demographic data for Grenville, South Dakota is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against South Dakota state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 439 Census-designated places in South Dakota. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
Free data download: Get all South Dakota city and county demographics as CSV. Download Cities CSV | Download Counties CSV
Frequently Asked Questions
What is the population of Grenville, South Dakota?
Grenville, South Dakota has a population of 53 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Grenville, SD?
The median household income in Grenville is $90,385, which is 12% higher than the national median of $80,734.
What is the poverty rate in Grenville, SD?
The poverty rate in Grenville is 5.7%. This means approximately 3 residents live below the federal poverty line.
What is the racial makeup of Grenville, South Dakota?
Grenville's population is 94.3% White, 0.0% Black, 5.7% Hispanic/Latino, and 0.0% Asian.
What is the median home value in Grenville, SD?
The median home value in Grenville is $41,400. The home-value-to-income ratio is 0.5x.
How educated is Grenville, South Dakota?
13.2% of adults (25+) in Grenville hold a bachelor's degree or higher, and 5.7% hold a graduate or professional degree.