County outline
Where Jerauld County is located
Area breakdown
Land accounts for 98.8% of Jerauld County’s measured area and water for 1.2%. Its combined area converts to 1,379.4 square kilometers or approximately 340,859 acres.
Green: land · blue: water
| Measurement | Square miles | Square kilometers | Acres |
|---|---|---|---|
| Land | 526.133 | 1,362.678 | 336,725.1 |
| Water | 6.459 | 16.729 | 4,133.8 |
| Total | 532.592 | 1,379.407 | 340,858.9 |
How Jerauld County compares
By original Census land area, Jerauld County ranks #57 of 66 in South Dakota and #1990 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.
Its land area is 0.579 times the South Dakota county-equivalent median of 909.3 square miles. It accounts for 0.7% of the combined county land area in the state.
See the complete South Dakota ranking · What counts as a county equivalent?
Population and density of Jerauld County
The Census Bureau estimates that 1,654 people lived in Jerauld County on July 1, 2025. That ranks #3,148 of 3,222 county equivalents nationally and #61 of 66 in South Dakota. Since the April 1, 2020 estimates base of 1,660, the population has declined by 6 (−0.4%), compared with +5.5% for South Dakota as a whole.
With 526.1 square miles of land, that is 3.1 people per square mile (1.2 per km²), placing Jerauld County #2,969 nationally for density and #47 in South Dakota. The median county equivalent has 47 people per square mile; the South Dakota median is 5.7. Put another way, there are about 204 acres of land per resident.
| July 1 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Estimate | 1,644 | 1,643 | 1,655 | 1,686 | 1,675 | 1,654 |
| Change | — | −1 | +12 | +31 | −11 | −21 |
U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.
Cities and towns in Jerauld County
3 incorporated places lie at least partly in Jerauld County. Together they are home to 1,020 people (61.7%); the other 634 (38.3%) live outside any incorporated place, in unincorporated communities and rural areas.
The largest is Wessington Springs city, with 753 residents in the county.
| Incorporated place | Population 2025 | Since 2020 | Land mi² |
|---|---|---|---|
| Wessington Springs cityCounty seat | 753 | −2.3% | 1.801 |
| Alpena town | 215 | +1.9% | 1.631 |
| Lane town | 52 | +2% | 0.465 |
Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Jerauld County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.
Metropolitan area
Jerauld County is not part of any metropolitan or micropolitan statistical area in the Office of Management and Budget’s July 2023 delineation; 1,306 other county equivalents are also outside one. These areas are built around an urban core of at least 10,000 people plus the counties tied to it by commuting, so counties outside them are generally rural.
ZIP codes
5 ZIP Code Tabulation Areas have land in Jerauld County; 2 of them have most of their land inside the county, and the others mainly cover neighboring areas.
5731257355573585738257385
ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.
Counties bordering Jerauld County
Jerauld County shares a land border with 6 county equivalents. It has more land than 1 of them. The largest neighbor is Hand County (1,436.6 mi²) and the smallest is Buffalo County (471.4 mi²). Together with its neighbors, Jerauld County forms a block of 5,787.8 mi² of land, of which it holds 9.1%.
| Bordering county equivalent | Land mi² | Size vs. Jerauld | Compare |
|---|---|---|---|
| Hand County | 1,436.6 | 2.7× larger | Compare |
| Beadle County | 1,258.7 | 2.4× larger | Compare |
| Brule County | 817.2 | 1.6× larger | Compare |
| Aurora County | 708.5 | 1.3× larger | Compare |
| Sanborn County | 569.2 | 1.1× larger | Compare |
| Buffalo County | 471.4 | 1.1× smaller | Compare |
How big is Jerauld County compared with U.S. states?
Jerauld County has less land than any of the 50 states. Rhode Island, the smallest state by land area, has 1,033.9 mi², about 2 times as much. South Dakota’s county land could hold about 144 areas the size of Jerauld County.
Another way to picture it: the same land area would fill a square about 22.9 miles (36.9 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.
State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.
What stands out about Jerauld County?
Jerauld County has more land than 1,232 of the other 3,221 county equivalents in the dataset.
A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.
Does including water change its rank?
Using land plus water places Jerauld County at #2,069 nationally by total area, 79 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.
Its water share is 1.2%, compared with a national county-equivalent median of 1.2%. The two percentages are within 0.1 percentage points of each other. This describes the statistical geography’s land/water mix, not flood exposure or developable land.
Closest positions in the national land ranking
These entries sit immediately beside Jerauld County in the national ranking. They can be in different states and are not necessarily geographic neighbors.
| Land rank | County equivalent | Land mi² | Comparison |
|---|---|---|---|
| #1989 | Jefferson County, Georgia | 526.6 | Compare |
| #1990 | Jerauld County, South Dakota | 526.1 | This county |
| #1991 | Knox County, Ohio | 525.5 | Compare |
Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.
Representative coordinates
The Census internal point is 44.063410, -98.623170. It represents a location inside the geography; it is not necessarily the centroid or the address of a courthouse.
Source and precision
U.S. Census Bureau, 2026 Gazetteer Files, Counties. Original ALAND: 1,362,677,254 m²; AWATER: 16,727,973 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.
Common questions
How big is Jerauld County?
Jerauld County, South Dakota has 526.1 square miles (1,362.7 km²) of land and 6.459 square miles of water, for a total area of 532.6 square miles. It ranks #1990 of 3,222 U.S. county equivalents by land area.
Is Jerauld County the largest county in South Dakota?
No. Jerauld County ranks #57 of 66 in South Dakota by land area. The largest is Meade County, with 3,470.9 square miles of land.
What counties border Jerauld County?
Jerauld County shares a land border with Aurora County, Beadle County, Buffalo County, Sanborn County, Hand County, and Brule County.
What is the population of Jerauld County?
The Census Bureau estimates Jerauld County had 1,654 residents on July 1, 2025, ranking #3,148 of 3,222 county equivalents. That is 3.1 people per square mile of land.
What is the county seat of Jerauld County?
The county seat of Jerauld County is Wessington Springs.
What cities and towns are in Jerauld County?
Jerauld County has 3 incorporated places. The most populous are Wessington Springs city, Alpena town, and Lane town; 634 residents live outside any incorporated place.
Is Jerauld County part of a metropolitan area?
No. Jerauld County is outside every metropolitan and micropolitan statistical area in the July 2023 OMB delineation.
How many ZIP codes are in Jerauld County?
5 ZIP Code Tabulation Areas have land in Jerauld County, and 2 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.
How does Jerauld County compare with U.S. states?
It has less land than every state. Rhode Island, the smallest, has 2 times as much land.
How many acres of land are in Jerauld County?
The land measurement converts to approximately 336,725 acres. Including water, total area is approximately 340,859 acres. One square mile equals 640 acres.
Why might another source show a different area?
Check whether it reports land or total area, its Census vintage, and its rounding. Our guide explains how to reconcile county area figures.
Can this establish a property boundary?
No. Statistical measurements and generalized maps do not establish property lines. Consult the relevant local surveying or land-records authority.