Counties in South Dakota by social vulnerability score (FEMA National Risk Index), 2025
Ziebach County had the highest social vulnerability score (FEMA National Risk Index) of 66 counties in 2025, at 99.8. Union County had the lowest, at 10.6. The median was 25.3. Source: the Federal Emergency Management Agency.
Map of counties, 2025
- Under 11
- 11 to 25
- 25 to 50
- 50 to 86
- 86 and over
Top 40 counties, 2025
Full ranking
About this ranking
Social vulnerability of a US county as used in FEMA's National Risk Index, from 0 to 100: the county's national percentile rank among all counties, based on the Census Bureau's Community Resilience Estimates, which count residents with social and economic risk factors such as low income, age, disability and household conditions. Higher means more vulnerable.
The period is the year of the National Risk Index edition (the December 2025 edition is 2025), not a year of events. FEMA rebuilds the index with new data and methods in each edition, so values from different editions are not a time series. The index is meant for nationwide comparison and planning, not as a local risk assessment.
Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.
How to cite
Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties, Social Vulnerability Score (SOVI_SCORE). https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Retrieved 2026-10-12. This product uses the FEMA National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).Citation styles
APA 7
Federal Emergency Management Agency. (2025). National Risk Index Counties, Social Vulnerability Score (SOVI_SCORE) (Counties in South Dakota by social vulnerability score (FEMA National Risk Index), 2025) [Data set]. Retrieved October 12, 2026, from https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355
MLA 9
National Risk Index Counties, Social Vulnerability Score (SOVI_SCORE), Counties in South Dakota by social vulnerability score (FEMA National Risk Index), 2025. Federal Emergency Management Agency, 16 Dec. 2025, https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Invokely, https://invokely.ai/rankings/social-vulnerability-score/south-dakota-counties. Accessed 12 Oct. 2026.
Chicago (author-date)
Federal Emergency Management Agency. 2025. National Risk Index Counties, Social Vulnerability Score (SOVI_SCORE). Counties in South Dakota by social vulnerability score (FEMA National Risk Index), 2025. Dataset. Accessed October 12, 2026. https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Also distributed by Invokely, https://invokely.ai/rankings/social-vulnerability-score/south-dakota-counties.
Harvard
Federal Emergency Management Agency (2025) National Risk Index Counties, Social Vulnerability Score (SOVI_SCORE), Counties in South Dakota by social vulnerability score (FEMA National Risk Index), 2025 [Dataset]. Available at: https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355, via Invokely: https://invokely.ai/rankings/social-vulnerability-score/south-dakota-counties (Accessed: 12 October 2026).
BibTeX
@misc{federal_counties_in_south_dakota_2025,
author = {{Federal Emergency Management Agency}},
title = {{National Risk Index Counties, Social Vulnerability Score (SOVI\_SCORE): Counties in South Dakota by social vulnerability score (FEMA National Risk Index), 2025}},
year = {2025},
howpublished = {Data set},
url = {https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355},
urldate = {2026-10-12},
note = {Accessed via Invokely, https://invokely.ai/rankings/social-vulnerability-score/south-dakota-counties. Publisher attribution: Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties, Social Vulnerability Score (SOVI\_SCORE). https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Retrieved 2026-10-12. This product uses the FEMA National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).},
}
RIS
TY - DATA
AU - Federal Emergency Management Agency
TI - National Risk Index Counties, Social Vulnerability Score (SOVI_SCORE): Counties in South Dakota by social vulnerability score (FEMA National Risk Index), 2025
PY - 2025
DA - 2025/12/16
PB - Federal Emergency Management Agency
DB - Invokely
UR - https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355
L2 - https://invokely.ai/rankings/social-vulnerability-score/south-dakota-counties
Y2 - 2026/10/12
N1 - Accessed via Invokely, https://invokely.ai/rankings/social-vulnerability-score/south-dakota-counties.
N1 - Publisher attribution: Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties, Social Vulnerability Score (SOVI_SCORE). https://fema.maps.arcgis.com/home/item.html?id=39485e8035d446a5bff03259508ae355. Retrieved 2026-10-12. This product uses the FEMA National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
ER -
Use this data in your AI agent
Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:
Rank Counties in South Dakota by social vulnerability score (FEMA National Risk Index) using official data, and cite the source.
rank_places {"indicator":"nri_social_vulnerability_score","level":"province","within":"South Dakota","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=nri_social_vulnerability_score&level=province&within=South%20Dakota&limit=10Questions
Which county has the highest social vulnerability score (FEMA National Risk Index)?
Ziebach County, with 99.8 in 2025, according to the Federal Emergency Management Agency.
Which county has the lowest social vulnerability score (FEMA National Risk Index)?
Union County, with 10.6 in 2025.
Where does this ranking come from?
Every value comes from one source and one period, so the places are comparable: Federal Emergency Management Agency, National Risk Index Counties, Social Vulnerability Score (SOVI_SCORE). Retrieved 2026-10-12.