Health insurance in Marin County, California

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

4,448 uninsured people in Marin County earn inside the premium tax credit range — 47% of the county's uninsured. That is near the 51% national median. Within that band itself, 10.4% have no coverage.

Comparatively few people go uncovered

5.0% of Marin County's 191,015 under-65 residents have no health coverage — 9,505 people. That is below the California rate of 6.9%, and puts Marin County in the bottom quarter of the 3,143 counties measured nationally (3,023rd).

Relatively few are under the Medicaid line

2,031 of Marin County's uninsured — 21%, below the 31% typical of counties nationally — earn under $22,025 a year, which in California is Medicaid territory rather than marketplace territory.

The years before Medicare

2,069 people aged 50 to 64 in Marin County have no coverage, a rate of 3.6% — close to the 5.0% across all under-65 residents here. Age-rated premiums make this the most expensive group to cover before Medicare.

Marin County against California

Marin County is the 25th largest of the 34 California counties we publish. Its uninsured rate runs 1.9 points lower than California overall and 5 points fewer of its uninsured sit in the subsidy band than statewide. Coverage among 50 to 64 year olds is better here than across California.

Counties of a similar size

All California counties · How the credit works · Enrollment dates