Counties in South Carolina by diagnosed diabetes in adults, local model estimate, 2023

Marion County had the highest diagnosed diabetes in adults, local model estimate of 46 counties in 2023, at 22%. Charleston County had the lowest, at 11.4%. The median was 16.5%. Source: the Centers for Disease Control and Prevention.

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Highest22Marion County
Median16.546 counties

Map of counties, 2023

Abbeville County: 16.9 %Aiken County: 13.9 %Allendale County: 21.6 %Anderson County: 13.3 %Bamberg County: 19.5 %Barnwell County: 19.4 %Beaufort County: 12.7 %Berkeley County: 12.9 %Calhoun County: 17.3 %Charleston County: 11.4 %Cherokee County: 15 %Chester County: 16.9 %Chesterfield County: 18.1 %Clarendon County: 19.6 %Colleton County: 17.3 %Darlington County: 17.6 %Dillon County: 20.3 %Dorchester County: 12.8 %Edgefield County: 16.2 %Fairfield County: 20.5 %Florence County: 15.5 %Georgetown County: 16.9 %Greenville County: 12.2 %Greenwood County: 15.4 %Hampton County: 20.2 %Horry County: 14.9 %Jasper County: 17 %Kershaw County: 14.8 %Lancaster County: 14.1 %Laurens County: 15.6 %Lee County: 20.1 %Lexington County: 12.3 %McCormick County: 20.6 %Marion County: 22 %Marlboro County: 20.5 %Newberry County: 16.1 %Oconee County: 15.3 %Orangeburg County: 19 %Pickens County: 12.1 %Richland County: 13 %Saluda County: 16.8 %Spartanburg County: 13.5 %Sumter County: 15.8 %Union County: 19.1 %Williamsburg County: 20.4 %York County: 11.8 %
  • Under 13
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%, 2023. Source: CDC, PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), diagnosed diabetes in adults, crude prevalence. Boundaries: U.S. Census Bureau cartographic boundary files.

All counties, 2023

Marion County: 22 %Marion County22Allendale County: 21.6 %Allendale County21.6McCormick County: 20.6 %McCormick County20.6Fairfield County: 20.5 %Fairfield County20.5Marlboro County: 20.5 %Marlboro County20.5Williamsburg County: 20.4 %Williamsburg County20.4Dillon County: 20.3 %Dillon County20.3Hampton County: 20.2 %Hampton County20.2Lee County: 20.1 %Lee County20.1Clarendon County: 19.6 %Clarendon County19.6Bamberg County: 19.5 %Bamberg County19.5Barnwell County: 19.4 %Barnwell County19.4Union County: 19.1 %Union County19.1Orangeburg County: 19 %Orangeburg County19Chesterfield County: 18.1 %Chesterfield County18.1Darlington County: 17.6 %Darlington County17.6Calhoun County: 17.3 %Calhoun County17.3Colleton County: 17.3 %Colleton County17.3Jasper County: 17 %Jasper County17Abbeville County: 16.9 %Abbeville County16.9Chester County: 16.9 %Chester County16.9Georgetown County: 16.9 %Georgetown County16.9Saluda County: 16.8 %Saluda County16.8Edgefield County: 16.2 %Edgefield County16.2Newberry County: 16.1 %Newberry County16.1Sumter County: 15.8 %Sumter County15.8Laurens County: 15.6 %Laurens County15.6Florence County: 15.5 %Florence County15.5Greenwood County: 15.4 %Greenwood County15.4Oconee County: 15.3 %Oconee County15.3Cherokee County: 15 %Cherokee County15Horry County: 14.9 %Horry County14.9Kershaw County: 14.8 %Kershaw County14.8Lancaster County: 14.1 %Lancaster County14.1Aiken County: 13.9 %Aiken County13.9Spartanburg County: 13.5 %Spartanburg County13.5Anderson County: 13.3 %Anderson County13.3Richland County: 13 %Richland County13Berkeley County: 12.9 %Berkeley County12.9Dorchester County: 12.8 %Dorchester County12.8Beaufort County: 12.7 %Beaufort County12.7Lexington County: 12.3 %Lexington County12.3Greenville County: 12.2 %Greenville County12.2Pickens County: 12.1 %Pickens County12.1York County: 11.8 %York County11.8Charleston County: 11.4 %Charleston County11.4Marion County: 22 %Marion County22Allendale County: 21.6 %Allendale County21.6McCormick County: 20.6 %McCormick County20.6Fairfield County: 20.5 %Fairfield County20.5Marlboro County: 20.5 %Marlboro County20.5Williamsburg County: 20.4 %Williamsburg County20.4Dillon County: 20.3 %Dillon County20.3Hampton County: 20.2 %Hampton County20.2Lee County: 20.1 %Lee County20.1Clarendon County: 19.6 %Clarendon County19.6Bamberg County: 19.5 %Bamberg County19.5Barnwell County: 19.4 %Barnwell County19.4Union County: 19.1 %Union County19.1Orangeburg County: 19 %Orangeburg County19Chesterfield County: 18.1 %Chesterfield County18.1Darlington County: 17.6 %Darlington County17.6Calhoun County: 17.3 %Calhoun County17.3Colleton County: 17.3 %Colleton County17.3Jasper County: 17 %Jasper County17Abbeville County: 16.9 %Abbeville County16.9Chester County: 16.9 %Chester County16.9Georgetown County: 16.9 %Georgetown County16.9Saluda County: 16.8 %Saluda County16.8Edgefield County: 16.2 %Edgefield County16.2Newberry County: 16.1 %Newberry County16.1Sumter County: 15.8 %Sumter County15.8Laurens County: 15.6 %Laurens County15.6Florence County: 15.5 %Florence County15.5Greenwood County: 15.4 %Greenwood County15.4Oconee County: 15.3 %Oconee County15.3Cherokee County: 15 %Cherokee County15Horry County: 14.9 %Horry County14.9Kershaw County: 14.8 %Kershaw County14.8Lancaster County: 14.1 %Lancaster County14.1Aiken County: 13.9 %Aiken County13.9Spartanburg County: 13.5 %Spartanburg County13.5Anderson County: 13.3 %Anderson County13.3Richland County: 13 %Richland County13Berkeley County: 12.9 %Berkeley County12.9Dorchester County: 12.8 %Dorchester County12.8Beaufort County: 12.7 %Beaufort County12.7Lexington County: 12.3 %Lexington County12.3Greenville County: 12.2 %Greenville County12.2Pickens County: 12.1 %Pickens County12.1York County: 11.8 %York County11.8Charleston County: 11.4 %Charleston County11.4
%. Source: CDC, PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh, h3ej-a9ec and later releases), diagnosed diabetes in adults, crude prevalence. Retrieved 2026-10-12.

Full ranking

RankCounties2023 (%)Change on 2022
1Marion County22+2.3 pts
2Allendale County21.6+1.7 pts
3McCormick County20.6+2.4 pts
4Fairfield County20.5+0.9 pts
4Marlboro County20.5+1.8 pts
6Williamsburg County20.4+2.4 pts
7Dillon County20.3+0.9 pts
8Hampton County20.2+2.5 pts
9Lee County20.1+1.1 pts
10Clarendon County19.6+2 pts
11Bamberg County19.5+1.5 pts
12Barnwell County19.4+2.6 pts
13Union County19.1+2.2 pts
14Orangeburg County19+0.6 pts
15Chesterfield County18.1+2.9 pts
16Darlington County17.6+2.4 pts
17Calhoun County17.3+0.7 pts
17Colleton County17.3+0.4 pts
19Jasper County17+0.7 pts
20Abbeville County16.9+1.7 pts
20Chester County16.9+1.8 pts
20Georgetown County16.9+1.5 pts
23Saluda County16.8+1.1 pts
24Edgefield County16.2+0.9 pts
25Newberry County16.1+1.3 pts
26Sumter County15.8+1.3 pts
27Laurens County15.6+0.9 pts
28Florence County15.5+1 pts
29Greenwood County15.4+1.1 pts
30Oconee County15.3+1 pts
31Cherokee County15+1.4 pts
32Horry County14.9+1 pts
33Kershaw County14.8+0.8 pts
34Lancaster County14.1+1.4 pts
35Aiken County13.9+0.9 pts
36Spartanburg County13.5+1 pts
37Anderson County13.3+0.1 pts
38Richland County13+1.1 pts
39Berkeley County12.9+1.1 pts
40Dorchester County12.8+0.6 pts
41Beaufort County12.7+0.2 pts
42Lexington County12.3+0.5 pts
43Greenville County12.2+2.1 pts
44Pickens County12.1+1.2 pts
45York County11.8+1.2 pts
46Charleston County11.4+0.8 pts

Other periods

About this ranking

Percentage of adults who report being told by a doctor or other health professional that they have diabetes, other than diabetes only during pregnancy. 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), diagnosed diabetes 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), diagnosed diabetes in adults, crude prevalence (Counties in South Carolina by diagnosed diabetes in adults, local model estimate, 2023) [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), diagnosed diabetes in adults, crude prevalence, Counties in South Carolina by diagnosed diabetes in adults, local model estimate, 2023. Centers for Disease Control and Prevention, 4 Dec. 2025, https://www.cdc.gov/places/. Invokely, https://invokely.ai/rankings/adult-diabetes-rate-county-estimate/south-carolina-counties. 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), diagnosed diabetes in adults, crude prevalence. Counties in South Carolina by diagnosed diabetes in adults, local model estimate, 2023. Dataset. Accessed October 12, 2026. https://www.cdc.gov/places/. Also distributed by Invokely, https://invokely.ai/rankings/adult-diabetes-rate-county-estimate/south-carolina-counties.

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), diagnosed diabetes in adults, crude prevalence, Counties in South Carolina by diagnosed diabetes in adults, local model estimate, 2023 [Dataset]. Available at: https://www.cdc.gov/places/, via Invokely: https://invokely.ai/rankings/adult-diabetes-rate-county-estimate/south-carolina-counties (Accessed: 12 October 2026).

BibTeX
@misc{centers_counties_in_south_carolina_2023,
  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), diagnosed diabetes in adults, crude prevalence: Counties in South Carolina by diagnosed diabetes in adults, local model estimate, 2023}},
  year = {2025},
  howpublished = {Data set},
  url = {https://www.cdc.gov/places/},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/adult-diabetes-rate-county-estimate/south-carolina-counties. 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), diagnosed diabetes 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), diagnosed diabetes in adults, crude prevalence: Counties in South Carolina by diagnosed diabetes in adults, local model estimate, 2023
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-diabetes-rate-county-estimate/south-carolina-counties
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/adult-diabetes-rate-county-estimate/south-carolina-counties.
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), diagnosed diabetes 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 diagnosed diabetes in adults, local model estimate using official data, and cite the source.
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Questions

Which county has the highest diagnosed diabetes in adults, local model estimate?

Marion County, with 22% in 2023, according to the Centers for Disease Control and Prevention.

Which county has the lowest diagnosed diabetes in adults, local model estimate?

Charleston County, with 11.4% in 2023.

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), diagnosed diabetes in adults, crude prevalence. Retrieved 2026-10-12.

Diagnosed diabetes in adults, local model estimate: other rankings

Counties in South Carolina: more rankings