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Health insurance in St. Clair County, Illinois

6,690 people here have no coverage and earn in the range a premium tax credit is built for — 53% of everyone uninsured in the county.

Reviewed September 4, 2026 · 2024 Census data

6,690Uninsured, subsidy range 138–400% of poverty
6.3%Uninsured, under 65 12,678 people
5.1%Uninsured, 50 to 64 2,373 people
199,682Under-65 residents 294th of 3,143

Source: US Census Small Area Health Insurance Estimates, 2024 release. Income bands are measured against the federal poverty level.

Half the uninsured here sit in the subsidy range

6,690 uninsured people in St. Clair County earn inside the premium tax credit range — 53% of the county's uninsured. That is near the 51% national median. Within that band itself, 8.2% have no coverage.

How many people here have no coverage

6.3% of St. Clair County's 199,682 under-65 residents have no health coverage — 12,678 people. That is below the Illinois rate of 8.1%, and puts St. Clair County in the bottom quarter of the 3,143 counties measured nationally (2,718th).

Who falls under the Medicaid line

3,484 of St. Clair County's uninsured — 27%, close to the 31% typical nationally — earn under $22,025 a year, which in Illinois is Medicaid territory rather than marketplace territory.

The years before Medicare

2,373 people aged 50 to 64 in St. Clair County have no coverage, a rate of 5.1% — close to the 6.3% across all under-65 residents here. Age-rated premiums make this the most expensive group to cover before Medicare.

St. Clair County against Illinois

St. Clair County is the 9th largest of the 18 Illinois counties we publish. Its uninsured rate runs 1.8 points lower than Illinois overall and 2 points more of its uninsured sit in the subsidy band than statewide. Coverage among 50 to 64 year olds is better here than across Illinois.

St. Clair CountyIllinois National median
Uninsured, under 656.3% 8.1%9.8%
Uninsured in the subsidy band6,690 423,655—
Subsidy band as a share of uninsured53% 51% 51%
At or below 138% of poverty27% 28% 31%
Uninsured, 50 to 645.1% 7.2% 8.1%

Counties of a similar size

CountyUninsured In the subsidy bandShare
Madison County6.0%6,58452%
Winnebago County8.4%9,86552%
Champaign County6.4%4,92346%
Sangamon County5.5%4,33551%

What a plan actually costs in St. Clair County

These figures say how many people here a credit would reach. What it would be worth to you depends on your age, household and income — a licensed agent can work that out on the call.

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