Health insurance in Jefferson County, Colorado

Reviewed September 4, 2026 · 2024 Census data

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

How many here a premium tax credit would reach

Of the 34,101 people without coverage in Jefferson County, 15,934 — 47% — earn inside the premium tax credit range. That is near the 51% national median. Within that band itself, 11.9% have no coverage.

How many people here have no coverage

7.3% of Jefferson County's 469,170 under-65 residents have no health coverage — 34,101 people. That is below the Colorado rate of 9.3%, and puts Jefferson County in the bottom quarter of the 3,143 counties measured nationally (2,374th).

Relatively few are under the Medicaid line

7,183 of Jefferson County's uninsured — 21%, below the 31% typical of counties nationally — earn under $22,025 a year, which in Colorado is Medicaid territory rather than marketplace territory.

The years before Medicare

5,496 people aged 50 to 64 in Jefferson County have no coverage, a rate of 5.2% — close to the 7.3% across all under-65 residents here. Age-rated premiums make this the most expensive group to cover before Medicare.

Jefferson County against Colorado

Jefferson County is the 5th largest of the 11 Colorado counties we publish. Its uninsured rate runs 2.0 points lower than Colorado overall and 4 points fewer of its uninsured sit in the subsidy band than statewide. Coverage among 50 to 64 year olds is better here than across Colorado.

Counties of a similar size

All Colorado counties · How the credit works · Enrollment dates