St. Clair County Health Data
St. Clair County, Illinois
CDC County Health RankingsHealth Score
64/100
Average
Life Expectancy
74.1 yr
Uninsured Rate
5.3%
Health Statistics
Life Expectancy
74.1 yr
State avg 76.0 yr
National avg 77.5 yr
Uninsured Rate
5.3%
State avg 6.3%
National avg 9%
Primary Care Providers
59
per 100K population
National avg 82
Mental Health Providers
189
per 100K population
National avg 350
Poor / Fair Health
17.6%
State avg 17.9%
National avg 19.6%
Healthcare Access
Primary Care Physicians
26.3
per 100K residentsCDC: 58.9 per 100K
Dentists
4.3
per 100K residents
Nurse Practitioners & PAs
7.5
per 100K residents
Provider counts from CMS NPPES (National Provider Identifier Registry). Data current as of 2026.
Chronic Disease & Behavioral Health
These prevalence estimates come from the CDC PLACES program (Population-Level Analysis and Community Estimates), which combines BRFSS survey data with statistical modeling to produce county-level rates. Estimates are age-adjusted to enable fair comparisons across counties with different age distributions. Use them to spot where St. Clair County differs most from state and national norms.
Most prevalent chronic conditions
| Measure | St. Clair | State avg | National avg | Vs state |
|---|---|---|---|---|
| Obesity | 38.6% | 38.7% | 37.6% | near state average |
| Diabetes | 11.2% | 10.2% | 11.2% | 1.0 pts worse than state |
| High Blood Pressure | 35.1% | 32.0% | 33.5% | 3.1 pts worse than state |
| Depression | 21.6% | 23.3% | 24.1% | 1.7 pts better than state |
Health-risk behaviors
| Measure | St. Clair | State avg | National avg | Vs state |
|---|---|---|---|---|
| Current Cigarette Smoking | 14.3% | 15.5% | 16.3% | 1.2 pts better than state |
| Binge Drinking | 18.7% | 20.1% | 17.8% | 1.4 pts better than state |
| Physical Inactivity | 24.0% | 23.4% | 27.0% | 0.6 pts worse than state |
Preventive-care uptake
| Measure | St. Clair | State avg | National avg | Vs state |
|---|---|---|---|---|
| Annual Routine Checkup | 78.3% | 75.6% | 74.9% | 2.7 pts better than state |
| Dental Visit (past year) | 61.7% | 60.5% | 57.3% | 1.2 pts better than state |
| Mammography (women 50–74) | 75.7% | 70.6% | 73.3% | 5.1 pts better than state |
Daily-life impact
| Measure | St. Clair | State avg | National avg | Vs state |
|---|---|---|---|---|
| Frequent Mental Distress | 18.0% | 18.6% | 18.6% | 0.6 pts better than state |
| Short Sleep Duration | 38.8% | 37.2% | 37.3% | 1.6 pts worse than state |
These rates are part of the CDC PLACES survey. Compare St. Clair County nationally on mammography (women 50–74).
Source: CDC PLACES, 2023 release · age-adjusted prevalence (%). Confidence intervals are available on individual rankings pages.
Data Story
St. Clair County Life Expectancy Lower Than Illinois State Average
Health data brief for St. Clair County, Illinois.
In St. Clair County, life expectancy is 74.1 years, which is lower than both the Illinois state average of 76.0 years and the national average of 77 years. The county reports that 17.6% of adults are in poor or fair health, a figure slightly above the national average of 17%. The uninsured rate in the county is 5.3%, which is lower than the state average of 6.3% and significantly lower than the national average of 10%. Regarding healthcare access, the county has 59 primary care providers per 100,000 residents, compared to the national median of 70, and 189 mental health providers per 100,000, which is below the national median of 250. Explore state-level data.
Sources
- CDC County Health Rankings v2
- HHS NPPES
Get Care in St. Clair County, Illinois
Direct contact information for hospitals and community health resources serving this county. Hospital quality ratings come from CMS Care Compare — the federal program that measures hospital performance on safety, patient experience, and outcomes.
Hospitals near you
Compare all on Medicare.gov →Memorial Hospital
ERHshs St Elizabeth's Hospital
ERTouchette Regional Hospital Inc
EReHealth Insurance
Compare health insurance plans from top carriers for St. Clair County residents.
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Frequently Asked Questions
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Data Sources
Health data sourced from the County Health Rankings & Roadmaps, a collaboration between the Robert Wood Johnson Foundation and the University of Wisconsin Population Health Institute.
Data is informational only. Not medical or health advice. Coverage varies by county and reporting year.