Data / Rankings / High blood pressure in adults, local model estimate / Counties in Illinois

Counties in Illinois by high blood pressure in adults, local model estimate

Alexander County had the highest high blood pressure in adults, local model estimate of 102 counties in 2021, at 46.1%. DuPage County had the lowest, at 27.8%. The median was 36.5%. Source: the Centers for Disease Control and Prevention.

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Highest46.1Alexander County
Lowest27.8DuPage County
Median36.5102 counties

Map of counties, 2021

Adams County: 35.9 %Alexander County: 46.1 %Bond County: 35.5 %Boone County: 33.4 %Brown County: 35.2 %Bureau County: 37.6 %Calhoun County: 37 %Carroll County: 36.9 %Cass County: 35.6 %Champaign County: 28 %Christian County: 36.5 %Clark County: 35.4 %Clay County: 37.3 %Clinton County: 34.9 %Coles County: 32.6 %Cook County: 30.3 %Crawford County: 36.5 %Cumberland County: 35.8 %DeKalb County: 29 %De Witt County: 36 %Douglas County: 33.5 %DuPage County: 27.8 %Edgar County: 38.2 %Edwards County: 38.2 %Effingham County: 34.9 %Fayette County: 37.3 %Ford County: 35.8 %Franklin County: 38.4 %Fulton County: 36.8 %Gallatin County: 39.9 %Greene County: 37.2 %Grundy County: 31.6 %Hamilton County: 38.2 %Hancock County: 38 %Hardin County: 40.1 %Henderson County: 38.6 %Henry County: 35.3 %Iroquois County: 37.7 %Jackson County: 32.5 %Jasper County: 35.9 %Jefferson County: 36.7 %Jersey County: 34.1 %Jo Daviess County: 39.6 %Johnson County: 36.7 %Kane County: 32.1 %Kankakee County: 34.1 %Kendall County: 27.9 %Knox County: 38.1 %Lake County: 29.6 %LaSalle County: 35.7 %Lawrence County: 36.6 %Lee County: 36.8 %Livingston County: 35.9 %Logan County: 34 %McDonough County: 33.3 %McHenry County: 31.3 %McLean County: 29.7 %Macon County: 37.6 %Macoupin County: 36.5 %Madison County: 34.9 %Marion County: 38.3 %Marshall County: 37.5 %Mason County: 38.2 %Massac County: 39.6 %Menard County: 34.2 %Mercer County: 37 %Monroe County: 31.8 %Montgomery County: 37.2 %Morgan County: 37.4 %Moultrie County: 35.5 %Ogle County: 35.9 %Peoria County: 34.6 %Perry County: 38.8 %Piatt County: 33.9 %Pike County: 37.7 %Pope County: 43 %Pulaski County: 43.4 %Putnam County: 36.9 %Randolph County: 37.5 %Richland County: 36.8 %Rock Island County: 35.8 %St. Clair County: 36 %Saline County: 38 %Sangamon County: 33.9 %Schuyler County: 39.4 %Scott County: 37.2 %Shelby County: 37 %Stark County: 37.3 %Stephenson County: 39.8 %Tazewell County: 34.8 %Union County: 38.7 %Vermilion County: 38.6 %Wabash County: 37 %Warren County: 34.3 %Washington County: 36.7 %Wayne County: 38.5 %White County: 39.4 %Whiteside County: 36.4 %Will County: 32.1 %Williamson County: 35.5 %Winnebago County: 36.4 %Woodford County: 33.8 %
  • Under 34
  • 34 to 36
  • 36 to 37
  • 37 to 38
  • 38 and over
%, 2021. Source: CDC, PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh and later releases), high blood pressure in adults, crude prevalence. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2021

Alexander County: 46.1 %Alexander County46.1Pulaski County: 43.4 %Pulaski County43.4Pope County: 43 %Pope County43Hardin County: 40.1 %Hardin County40.1Gallatin County: 39.9 %Gallatin County39.9Stephenson County: 39.8 %Stephenson County39.8Jo Daviess County: 39.6 %Jo Daviess County39.6Massac County: 39.6 %Massac County39.6Schuyler County: 39.4 %Schuyler County39.4White County: 39.4 %White County39.4Perry County: 38.8 %Perry County38.8Union County: 38.7 %Union County38.7Henderson County: 38.6 %Henderson County38.6Vermilion County: 38.6 %Vermilion County38.6Wayne County: 38.5 %Wayne County38.5Franklin County: 38.4 %Franklin County38.4Marion County: 38.3 %Marion County38.3Edgar County: 38.2 %Edgar County38.2Edwards County: 38.2 %Edwards County38.2Hamilton County: 38.2 %Hamilton County38.2Mason County: 38.2 %Mason County38.2Knox County: 38.1 %Knox County38.1Hancock County: 38 %Hancock County38Saline County: 38 %Saline County38Iroquois County: 37.7 %Iroquois County37.7Pike County: 37.7 %Pike County37.7Bureau County: 37.6 %Bureau County37.6Macon County: 37.6 %Macon County37.6Marshall County: 37.5 %Marshall County37.5Randolph County: 37.5 %Randolph County37.5Morgan County: 37.4 %Morgan County37.4Clay County: 37.3 %Clay County37.3Fayette County: 37.3 %Fayette County37.3Stark County: 37.3 %Stark County37.3Greene County: 37.2 %Greene County37.2Montgomery County: 37.2 %Montgomery County37.2Scott County: 37.2 %Scott County37.2Calhoun County: 37 %Calhoun County37Mercer County: 37 %Mercer County37Shelby County: 37 %Shelby County37Alexander County: 46.1 %Alexander County46.1Pulaski County: 43.4 %Pulaski County43.4Pope County: 43 %Pope County43Hardin County: 40.1 %Hardin County40.1Gallatin County: 39.9 %Gallatin County39.9Stephenson County: 39.8 %Stephenson County39.8Jo Daviess County: 39.6 %Jo Daviess County39.6Massac County: 39.6 %Massac County39.6Schuyler County: 39.4 %Schuyler County39.4White County: 39.4 %White County39.4Perry County: 38.8 %Perry County38.8Union County: 38.7 %Union County38.7Henderson County: 38.6 %Henderson County38.6Vermilion County: 38.6 %Vermilion County38.6Wayne County: 38.5 %Wayne County38.5Franklin County: 38.4 %Franklin County38.4Marion County: 38.3 %Marion County38.3Edgar County: 38.2 %Edgar County38.2Edwards County: 38.2 %Edwards County38.2Hamilton County: 38.2 %Hamilton County38.2Mason County: 38.2 %Mason County38.2Knox County: 38.1 %Knox County38.1Hancock County: 38 %Hancock County38Saline County: 38 %Saline County38Iroquois County: 37.7 %Iroquois County37.7Pike County: 37.7 %Pike County37.7Bureau County: 37.6 %Bureau County37.6Macon County: 37.6 %Macon County37.6Marshall County: 37.5 %Marshall County37.5Randolph County: 37.5 %Randolph County37.5Morgan County: 37.4 %Morgan County37.4Clay County: 37.3 %Clay County37.3Fayette County: 37.3 %Fayette County37.3Stark County: 37.3 %Stark County37.3Greene County: 37.2 %Greene County37.2Montgomery County: 37.2 %Montgomery County37.2Scott County: 37.2 %Scott County37.2Calhoun County: 37 %Calhoun County37Mercer County: 37 %Mercer County37Shelby County: 37 %Shelby County37
%. Source: CDC, PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh and later releases), high blood pressure in adults, crude prevalence. Retrieved 2026-10-12.

Full ranking

RankCounties2021 (%)
1Alexander County46.1
2Pulaski County43.4
3Pope County43
4Hardin County40.1
5Gallatin County39.9
6Stephenson County39.8
7Jo Daviess County39.6
7Massac County39.6
9Schuyler County39.4
9White County39.4
11Perry County38.8
12Union County38.7
13Henderson County38.6
13Vermilion County38.6
15Wayne County38.5
16Franklin County38.4
17Marion County38.3
18Edgar County38.2
18Edwards County38.2
18Hamilton County38.2
18Mason County38.2
22Knox County38.1
23Hancock County38
23Saline County38
25Iroquois County37.7
25Pike County37.7
27Bureau County37.6
27Macon County37.6
29Marshall County37.5
29Randolph County37.5
31Morgan County37.4
32Clay County37.3
32Fayette County37.3
32Stark County37.3
35Greene County37.2
35Montgomery County37.2
35Scott County37.2
38Calhoun County37
38Mercer County37
38Shelby County37
38Wabash County37
42Carroll County36.9
42Putnam County36.9
44Fulton County36.8
44Lee County36.8
44Richland County36.8
47Jefferson County36.7
47Johnson County36.7
47Washington County36.7
50Lawrence County36.6
51Christian County36.5
51Crawford County36.5
51Macoupin County36.5
54Whiteside County36.4
54Winnebago County36.4
56De Witt County36
56St. Clair County36
58Adams County35.9
58Jasper County35.9
58Livingston County35.9
58Ogle County35.9
62Cumberland County35.8
62Ford County35.8
62Rock Island County35.8
65LaSalle County35.7
66Cass County35.6
67Bond County35.5
67Moultrie County35.5
67Williamson County35.5
70Clark County35.4
71Henry County35.3
72Brown County35.2
73Clinton County34.9
73Effingham County34.9
73Madison County34.9
76Tazewell County34.8
77Peoria County34.6
78Warren County34.3
79Menard County34.2
80Jersey County34.1
80Kankakee County34.1
82Logan County34
83Piatt County33.9
83Sangamon County33.9
85Woodford County33.8
86Douglas County33.5
87Boone County33.4
88McDonough County33.3
89Coles County32.6
90Jackson County32.5
91Kane County32.1
91Will County32.1
93Monroe County31.8
94Grundy County31.6
95McHenry County31.3
96Cook County30.3
97McLean County29.7
98Lake County29.6
99DeKalb County29
100Champaign County28
101Kendall County27.9
102DuPage County27.8

Other periods

About this ranking

Percentage of adults who have ever been told by a doctor, nurse or other health professional that they have high blood pressure. 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 2021; its eight former counties are not served. The question is asked in odd years only.

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 and later releases), high blood pressure 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 and later releases), high blood pressure in adults, crude prevalence (Counties in Illinois by high blood pressure 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 and later releases), high blood pressure in adults, crude prevalence, Counties in Illinois by high blood pressure 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-high-blood-pressure-rate-county-estimate/illinois-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 and later releases), high blood pressure in adults, crude prevalence. Counties in Illinois by high blood pressure 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-high-blood-pressure-rate-county-estimate/illinois-counties?period=2021.

Harvard

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

BibTeX
@misc{centers_counties_in_illinois_by_2021,
  author = {{Centers for Disease Control and Prevention}},
  title = {{PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh and later releases), high blood pressure in adults, crude prevalence: Counties in Illinois by high blood pressure 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-high-blood-pressure-rate-county-estimate/illinois-counties?period=2021. Publisher attribution: Centers for Disease Control and Prevention (CDC). PLACES: Local Data for Better Health, County Data (swc5-untb, fu4u-a9bh and later releases), high blood pressure 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 and later releases), high blood pressure in adults, crude prevalence: Counties in Illinois by high blood pressure 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-high-blood-pressure-rate-county-estimate/illinois-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/adult-high-blood-pressure-rate-county-estimate/illinois-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 and later releases), high blood pressure 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 Illinois by high blood pressure in adults, local model estimate using official data, and cite the source.
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Questions

Which county has the highest high blood pressure in adults, local model estimate?

Alexander County, with 46.1% in 2021, according to the Centers for Disease Control and Prevention.

Which county has the lowest high blood pressure in adults, local model estimate?

DuPage County, with 27.8% 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 and later releases), high blood pressure in adults, crude prevalence. Retrieved 2026-10-12.

High blood pressure in adults, local model estimate: other rankings

Counties in Illinois: more rankings