Data / Rankings / Current asthma in adults, local model estimate / Counties in South Carolina

Counties in South Carolina by current asthma in adults, local model estimate

Dillon County had the highest current asthma in adults, local model estimate of 46 counties in 2021, at 11.1%. Beaufort County had the lowest, at 8.4%. The median was 9.9%. Source: the Centers for Disease Control and Prevention.

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Highest11.1Dillon County
Lowest8.4Beaufort County
Median9.946 counties

Map of counties, 2021

Abbeville County: 10.1 %Aiken County: 9.5 %Allendale County: 11 %Anderson County: 9.6 %Bamberg County: 10.6 %Barnwell County: 10.8 %Beaufort County: 8.4 %Berkeley County: 9.3 %Calhoun County: 9.9 %Charleston County: 9 %Cherokee County: 10 %Chester County: 10 %Chesterfield County: 10.3 %Clarendon County: 10.2 %Colleton County: 10.3 %Darlington County: 10.3 %Dillon County: 11.1 %Dorchester County: 9.3 %Edgefield County: 9.7 %Fairfield County: 10.5 %Florence County: 9.8 %Georgetown County: 9.4 %Greenville County: 9 %Greenwood County: 9.8 %Hampton County: 10.6 %Horry County: 9.3 %Jasper County: 9.5 %Kershaw County: 9.4 %Lancaster County: 9.3 %Laurens County: 10.1 %Lee County: 10.6 %Lexington County: 9.2 %McCormick County: 9.2 %Marion County: 10.9 %Marlboro County: 10.8 %Newberry County: 9.5 %Oconee County: 9.2 %Orangeburg County: 10.6 %Pickens County: 9.3 %Richland County: 10 %Saluda County: 9.8 %Spartanburg County: 9.9 %Sumter County: 10.2 %Union County: 10.4 %Williamsburg County: 10.3 %York County: 9.1 %
  • Under 9.3
  • 9.3 to 9.5
  • 9.5 to 9.9
  • 9.9 to 10
  • 10 to 11
  • 11 and over
%, 2021. Source: CDC, PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2021

Dillon County: 11.1 %Dillon County11.1Allendale County: 11 %Allendale County11Marion County: 10.9 %Marion County10.9Barnwell County: 10.8 %Barnwell County10.8Marlboro County: 10.8 %Marlboro County10.8Bamberg County: 10.6 %Bamberg County10.6Hampton County: 10.6 %Hampton County10.6Lee County: 10.6 %Lee County10.6Orangeburg County: 10.6 %Orangeburg County10.6Fairfield County: 10.5 %Fairfield County10.5Union County: 10.4 %Union County10.4Chesterfield County: 10.3 %Chesterfield County10.3Colleton County: 10.3 %Colleton County10.3Darlington County: 10.3 %Darlington County10.3Williamsburg County: 10.3 %Williamsburg County10.3Clarendon County: 10.2 %Clarendon County10.2Sumter County: 10.2 %Sumter County10.2Abbeville County: 10.1 %Abbeville County10.1Laurens County: 10.1 %Laurens County10.1Cherokee County: 10 %Cherokee County10Chester County: 10 %Chester County10Richland County: 10 %Richland County10Calhoun County: 9.9 %Calhoun County9.9Spartanburg County: 9.9 %Spartanburg County9.9Florence County: 9.8 %Florence County9.8Greenwood County: 9.8 %Greenwood County9.8Saluda County: 9.8 %Saluda County9.8Edgefield County: 9.7 %Edgefield County9.7Anderson County: 9.6 %Anderson County9.6Aiken County: 9.5 %Aiken County9.5Jasper County: 9.5 %Jasper County9.5Newberry County: 9.5 %Newberry County9.5Georgetown County: 9.4 %Georgetown County9.4Kershaw County: 9.4 %Kershaw County9.4Berkeley County: 9.3 %Berkeley County9.3Dorchester County: 9.3 %Dorchester County9.3Horry County: 9.3 %Horry County9.3Lancaster County: 9.3 %Lancaster County9.3Pickens County: 9.3 %Pickens County9.3Lexington County: 9.2 %Lexington County9.2McCormick County: 9.2 %McCormick County9.2Oconee County: 9.2 %Oconee County9.2York County: 9.1 %York County9.1Charleston County: 9 %Charleston County9Greenville County: 9 %Greenville County9Beaufort County: 8.4 %Beaufort County8.4Dillon County: 11.1 %Dillon County11.1Allendale County: 11 %Allendale County11Marion County: 10.9 %Marion County10.9Barnwell County: 10.8 %Barnwell County10.8Marlboro County: 10.8 %Marlboro County10.8Bamberg County: 10.6 %Bamberg County10.6Hampton County: 10.6 %Hampton County10.6Lee County: 10.6 %Lee County10.6Orangeburg County: 10.6 %Orangeburg County10.6Fairfield County: 10.5 %Fairfield County10.5Union County: 10.4 %Union County10.4Chesterfield County: 10.3 %Chesterfield County10.3Colleton County: 10.3 %Colleton County10.3Darlington County: 10.3 %Darlington County10.3Williamsburg County: 10.3 %Williamsburg County10.3Clarendon County: 10.2 %Clarendon County10.2Sumter County: 10.2 %Sumter County10.2Abbeville County: 10.1 %Abbeville County10.1Laurens County: 10.1 %Laurens County10.1Cherokee County: 10 %Cherokee County10Chester County: 10 %Chester County10Richland County: 10 %Richland County10Calhoun County: 9.9 %Calhoun County9.9Spartanburg County: 9.9 %Spartanburg County9.9Florence County: 9.8 %Florence County9.8Greenwood County: 9.8 %Greenwood County9.8Saluda County: 9.8 %Saluda County9.8Edgefield County: 9.7 %Edgefield County9.7Anderson County: 9.6 %Anderson County9.6Aiken County: 9.5 %Aiken County9.5Jasper County: 9.5 %Jasper County9.5Newberry County: 9.5 %Newberry County9.5Georgetown County: 9.4 %Georgetown County9.4Kershaw County: 9.4 %Kershaw County9.4Berkeley County: 9.3 %Berkeley County9.3Dorchester County: 9.3 %Dorchester County9.3Horry County: 9.3 %Horry County9.3Lancaster County: 9.3 %Lancaster County9.3Pickens County: 9.3 %Pickens County9.3Lexington County: 9.2 %Lexington County9.2McCormick County: 9.2 %McCormick County9.2Oconee County: 9.2 %Oconee County9.2York County: 9.1 %York County9.1Charleston County: 9 %Charleston County9Greenville County: 9 %Greenville County9Beaufort County: 8.4 %Beaufort County8.4
%. Source: CDC, PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Dillon County11.1
2Allendale County11
3Marion County10.9
4Barnwell County10.8
4Marlboro County10.8
6Bamberg County10.6
6Hampton County10.6
6Lee County10.6
6Orangeburg County10.6
10Fairfield County10.5
11Union County10.4
12Chesterfield County10.3
12Colleton County10.3
12Darlington County10.3
12Williamsburg County10.3
16Clarendon County10.2
16Sumter County10.2
18Abbeville County10.1
18Laurens County10.1
20Cherokee County10
20Chester County10
20Richland County10
23Calhoun County9.9
23Spartanburg County9.9
25Florence County9.8
25Greenwood County9.8
25Saluda County9.8
28Edgefield County9.7
29Anderson County9.6
30Aiken County9.5
30Jasper County9.5
30Newberry County9.5
33Georgetown County9.4
33Kershaw County9.4
35Berkeley County9.3
35Dorchester County9.3
35Horry County9.3
35Lancaster County9.3
35Pickens County9.3
40Lexington County9.2
40McCormick County9.2
40Oconee County9.2
43York County9.1
44Charleston County9
44Greenville County9
46Beaufort County8.4

Other periods

About this ranking

Percentage of adults who have ever been told by a doctor, nurse or other health professional that they have asthma and say they still have it. Model-based estimate for adults aged 18 and over from CDC PLACES. Crude prevalence, not age-adjusted.

US counties and cities (incorporated places of 10,000 or more). CDC PLACES combines Behavioral Risk Factor Surveillance System (BRFSS) answers with local population data through multilevel regression and poststratification, so a county or city value is a model estimate, not a survey count. The year is the BRFSS survey year, not the release year. CDC says the method does not support tracking change in a place over time, and each annual release can change the model, so values for different years are not strictly comparable. A state is missing in a year when its BRFSS data did not meet standards (Kentucky and Pennsylvania in 2023, Florida in 2021). Connecticut counties appear as its nine planning regions from 2022; its eight former counties are not served. City values for 2021 come from the 2023 release, built on 2010 Census place boundaries; later years use 2020 boundaries.

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

Centers for Disease Control and Prevention (CDC). PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence. https://www.cdc.gov/places/. Retrieved 2026-10-12. These data are available free from CDC. Use does not imply endorsement by CDC, ATSDR, HHS or the United States Government.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

Centers for Disease Control and Prevention. (2025). PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence (Counties in South Carolina by current asthma in adults, local model estimate, 2021) [Data set]. Retrieved October 12, 2026, from https://www.cdc.gov/places/

MLA 9

PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence, Counties in South Carolina by current asthma in adults, local model estimate, 2021. Centers for Disease Control and Prevention, 4 Dec. 2025, https://www.cdc.gov/places/. Invokely, https://invokely.ai/rankings/adult-asthma-rate-county-estimate/south-carolina-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

Centers for Disease Control and Prevention. 2025. PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence. Counties in South Carolina by current asthma in adults, local model estimate, 2021. Dataset. Accessed October 12, 2026. https://www.cdc.gov/places/. Also distributed by Invokely, https://invokely.ai/rankings/adult-asthma-rate-county-estimate/south-carolina-counties?period=2021.

Harvard

Centers for Disease Control and Prevention (2025) PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence, Counties in South Carolina by current asthma in adults, local model estimate, 2021 [Dataset]. Available at: https://www.cdc.gov/places/, via Invokely: https://invokely.ai/rankings/adult-asthma-rate-county-estimate/south-carolina-counties?period=2021 (Accessed: 12 October 2026).

BibTeX
@misc{centers_counties_in_south_carolina_2021,
  author = {{Centers for Disease Control and Prevention}},
  title = {{PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence: Counties in South Carolina by current asthma in adults, local model estimate, 2021}},
  year = {2025},
  howpublished = {Data set},
  url = {https://www.cdc.gov/places/},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/adult-asthma-rate-county-estimate/south-carolina-counties?period=2021. Publisher attribution: Centers for Disease Control and Prevention (CDC). PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence. https://www.cdc.gov/places/. Retrieved 2026-10-12. These data are available free from CDC. Use does not imply endorsement by CDC, ATSDR, HHS or the United States Government.},
}
RIS
TY  - DATA
AU  - Centers for Disease Control and Prevention
TI  - PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence: Counties in South Carolina by current asthma in adults, local model estimate, 2021
PY  - 2025
DA  - 2025/12/04
PB  - Centers for Disease Control and Prevention
DB  - Invokely
UR  - https://www.cdc.gov/places/
L2  - https://invokely.ai/rankings/adult-asthma-rate-county-estimate/south-carolina-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/adult-asthma-rate-county-estimate/south-carolina-counties?period=2021.
N1  - Publisher attribution: Centers for Disease Control and Prevention (CDC). PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence. https://www.cdc.gov/places/. Retrieved 2026-10-12. These data are available free from CDC. Use does not imply endorsement by CDC, ATSDR, HHS or the United States Government.
ER  -
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Rank Counties in South Carolina by current asthma in adults, local model estimate using official data, and cite the source.
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Questions

Which county has the highest current asthma in adults, local model estimate?

Dillon County, with 11.1% in 2021, according to the Centers for Disease Control and Prevention.

Which county has the lowest current asthma in adults, local model estimate?

Beaufort County, with 8.4% in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: Centers for Disease Control and Prevention, PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), current asthma in adults, crude prevalence. Retrieved 2026-10-12.

Current asthma in adults, local model estimate: other rankings

Counties in South Carolina: more rankings