HealthPlanIndex (866) 843-0930
HealthPlanIndex is not a government website and is not affiliated with, endorsed by, or operated by HealthCare.gov, the Centers for Medicare & Medicaid Services, or any state health insurance exchange.

Health insurance in Contra Costa County, California

22,936 people here have no coverage and earn in the range a premium tax credit is built for — 47% of everyone uninsured in the county.

Reviewed September 4, 2026 · 2024 Census data

22,936Uninsured, subsidy range 138–400% of poverty
5.0%Uninsured, under 65 48,457 people
4.2%Uninsured, 50 to 64 9,562 people
964,496Under-65 residents 40th of 3,143

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 48,457 people without coverage in Contra Costa County, 22,936 — 47% — earn inside the premium tax credit range. That is near the 51% national median. Within that band itself, 8.6% have no coverage.

Comparatively few people go uncovered

5.0% of Contra Costa County's 964,496 under-65 residents have no health coverage — 48,457 people. That is below the California rate of 6.9%, and puts Contra Costa County in the bottom quarter of the 3,143 counties measured nationally (3,022nd).

Who falls under the Medicaid line

11,188 of Contra Costa County's uninsured — 23%, 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

9,562 people aged 50 to 64 in Contra Costa County have no coverage, a rate of 4.2% — close to the 5.0% across all under-65 residents here. Age-rated premiums make this the most expensive group to cover before Medicare.

Contra Costa County against California

Contra Costa County is the 8th 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.

Contra Costa CountyCalifornia National median
Uninsured, under 655.0% 6.9%9.8%
Uninsured in the subsidy band22,936 1,173,956—
Subsidy band as a share of uninsured47% 52% 51%
At or below 138% of poverty23% 25% 31%
Uninsured, 50 to 644.2% 6.6% 8.1%

Counties of a similar size

CountyUninsured In the subsidy bandShare
Fresno County7.5%34,11853%
Kern County8.6%34,62451%
San Joaquin County7.7%28,59554%
Ventura County7.0%24,87753%

What a plan actually costs in Contra Costa 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.

(866) 843-0930

9am – 6pm, Monday through Friday, Eastern time. Closed Saturdays and Sundays.
You reach Clearline Health Insurance, a licensed insurance agency. There is no cost to call.

When you call the number on this site you reach Clearline Health Insurance (National Producer Number 19024830), a licensed insurance agency. HealthPlanIndex is compensated for that connection. That is how this site is paid for, and it does not change what you pay for a plan.

All California counties · How the credit works · Enrollment dates

(866) 843-0930 9am–6pm ET, Mon–Fri