Hamlin County, South Dakota Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 28th-largest in South Dakota
The population of Hamlin County, South Dakota is 6,288 as of the 2023 American Community Survey, making it the 28th-largest county in South Dakota. The median household income is $83,194, the median home value is $207,700, and the median age is 32.5.
The population of Hamlin County has grown 11.5% since 2010 (5,915 → 6,596), a +0.78% annualized rate.
6,288
Population
+0.78%
Annual growth
12
People / sq mi
$83,194
Median Income
$207,700
Median Home Value
Hamlin County covers 507 sq mi of land at 12.4 people per square mile.
About Hamlin County, SD
Hamlin County skews on age — the median resident is 32.5, younger than the national median. With 6,288 residents, Hamlin County is a county in South Dakota. It ranks #28 among counties in South Dakota by population.
Median household income is $83,194, above the US median of $78,538. Very few residents live in poverty — 4.2%, below the national 12.4%. Homes carry a median value of $207,700, with typical rent around $769.
Roughly 24.4% of adults have a bachelor’s, below the national 35.0%. Remote work is below the national 14.0% at 7.6%, and the average commute runs about 22 minutes each way.
Hamlin County Population History (2010-2024)
The county of Hamlin County had a population of 5,915 in 2010 and 6,596 in 2024, a 11.5% growth over 14 years. The peak was 6,596 in 2024. Average annual growth rate: 0.79%.
6,596
Population (2024)
5,915
Population (2010)
6,596
Peak (2024)
0.79%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 5,915 |
| 2011 | 5,964 |
| 2012 | 5,946 |
| 2013 | 5,927 |
| 2014 | 5,952 |
| 2015 | 5,977 |
| 2016 | 5,916 |
| 2017 | 6,032 |
| 2018 | 6,113 |
| 2019 | 6,224 |
| 2020 | 6,161 |
| 2021 | 6,261 |
| 2022 | 6,395 |
| 2023 | 6,450 |
| 2024 | 6,596 |
Race & Ethnicity
| White | 92.8% |
| Black or African American | 0.3% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.8% |
| Two or More Races | 0.0% |
Age & Sex
32.5
Median Age
48.6%
Female
51.4%
Male
14.2%
Age 65+
Age Distribution
Children (under 15): 27.8% · Seniors (65+): 14.2%
Income & Poverty
| Median household income | $83,194+$10,773 vs state |
| Mean household income | $101,165 |
| Per-capita income | $35,757 |
| Poverty rate | 4.2%-3.2% vs state |
| Unemployment rate | 1.2% |
| Employment-to-population | 67.0% |
Top Industries by Employment
The largest employment sector in Hamlin County is professional & business services, accounting for 21.2% of workers.
How residents commute
0.0%
Drive alone
6.0%
Carpool
74.0%
Public transit
7.6%
Work from home
21.8 min
Avg commute
Housing
$207,700$-29,100 vs state
Median home value
$769
Median rent
81.5%
Homeownership rate
2,831
Total housing units
77.0%
Occupied
23.0%
Vacant
18.5%
Renter-occupied
Social & access
90.1%
With health insurance
95.8%
With broadband internet
23.9%
Foreign-born
6.7%
Veterans (18+)
7.4%
With a disability
93.9%
Speak language other than English at home
Education
92.6%
High School+
24.4%
Bachelor's+
Largest cities in South Dakota
Other counties in South Dakota
Part of South Dakota
Metro areas in South Dakota
County rankings
Frequently Asked Questions
Hamlin County, South Dakota has a population of 6,288 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 28th-largest county in South Dakota. Population density is 12 people per square mile.
The population of Hamlin County has grown 11.5% since 2010 (5,915 → 6,596), a +0.78% annualized rate.
The median household income in Hamlin County, South Dakota is $83,194, with mean (average) household income of $101,165 and per-capita income of $35,757. 4.2% of residents live below the federal poverty level.
In Hamlin County, the largest racial and ethnic groups are White (92.8%), Hispanic or Latino (1.8%), Black or African American (0.3%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Hamlin County, South Dakota is 32.5 years. Residents are 48.6% female and 51.4% male.
The median home value in Hamlin County is $207,700 and median monthly rent is $769. 81.5% of occupied housing units are owner-occupied. The county has 2,831 total housing units, 23.0% of which are vacant.
The largest employment sector in Hamlin County, South Dakota is professional, scientific, and management services, employing 21.2% of workers. The unemployment rate is 1.2%.
Sioux Falls is among the largest cities associated with Hamlin County, South Dakota, with a population of 197,642.
Hamlin County, SD Climate
Hamlin County, SD has an average annual temperature of 6.3°C (43°F) and receives about 573 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
6.3°C
Avg Temp
573
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | -12° / 11° | 13 mm |
| February | -8° / 18° | 14 mm |
| March | -1° / 30° | 34 mm |
| April | 7° / 44° | 54 mm |
| May | 14° / 58° | 73 mm |
| June | 19° / 67° | 99 mm |
| July | 22° / 71° | 78 mm |
| August | 21° / 69° | 69 mm |
| September | 15° / 59° | 55 mm |
| October | 8° / 47° | 48 mm |
| November | -1° / 29° | 25 mm |
| December | -9° / 16° | 11 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Hamlin County, SD
The most comfortable months to visit Hamlin County, SD are typically August, July and June, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 29°C high). The coldest is January (near -17°C low). June is usually the wettest month.
Where to stay near Hamlin County
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Population, race, income, age, and trends across South Dakota
Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.