More than 9 in 10 people in the U.S. had some type of health insurance coverage in 2021, according to the latest data from the U.S. Census Bureau. Nationwide, 8.3% of Americans went uninsured for the full year.
However, the rates of coverage can vary widely from state to state.
Following are the states with the smallest proportion of uninsured residents and, therefore, the biggest share of people covered by health insurance.
For a look at the states at the opposite end of this spectrum, check out “15 States Where the Most People Lack Health Insurance.”
14. Delaware (three-way tie)
The Affordable Care Act of 2010 gave states the option to expand Medicaid eligibility to people whose income was below are particular threshold. Delaware, like nearly every other state on this list, is among the majority of states that had expanded their Medicaid programs as of Jan. 1, 2021, the Census Bureau reports.
Medicaid is a joint federal and state health insurance program that covers people with low incomes or disabilities.
State’s population without health insurance coverage in:
- 2021: 5.7%
- 2019: 6.6%
- 2010: 9.7%
State’s Medicaid expansion status as of Jan. 1, 2021: Expanded
14. Maine (three-way tie)
State’s population without health insurance coverage in:
- 2021: 5.7%
- 2019: 8.0%
- 2010: 10.1%
State’s Medicaid expansion status as of Jan. 1, 2021: Expanded
14. Kentucky (three-way tie)
State’s population without health insurance coverage in:
- 2021: 5.7%
- 2019: 6.4%
- 2010: 15.3%
State’s Medicaid expansion status as of Jan. 1, 2021: Expanded
13. Pennsylvania
State’s population without health insurance coverage in:
- 2021: 5.5%
- 2019: 5.8%
- 2010: 10.2%
State’s Medicaid expansion status as of Jan. 1, 2021: Expanded
12. Wisconsin
State’s population without health insurance coverage in:
- 2021: 5.4%
- 2019: 5.7%
- 2010: 9.4%
State’s Medicaid expansion status as of Jan. 1, 2021: Not expanded
10. New York (tie)
State’s population without health insurance coverage in:
- 2021: 5.2%
- 2019: 5.2%
- 2010: 11.9%
State’s Medicaid expansion status as of Jan. 1, 2021: Expanded
10. Connecticut (tie)
State’s population without health insurance coverage in:
- 2021: 5.2%
- 2019: 5.9%
- 2010: 9.1%
State’s Medicaid expansion status as of Jan. 1, 2021: Expanded
9. New Hampshire
State’s population without health insurance coverage in:
- 2021: 5.1%
- 2019: 6.3%
- 2010: 11.1%
State’s Medicaid expansion status as of Jan. 1, 2021: Expanded
8. Michigan
State’s population without health insurance coverage in:
- 2021: 5.0%
- 2019: 5.8%
- 2010: 12.4%
State’s Medicaid expansion status as of Jan. 1, 2021: Expanded
7. Iowa
State’s population without health insurance coverage in:
- 2021: 4.8%
- 2019: 5.0%
- 2010: 9.3%
State’s Medicaid expansion status as of Jan. 1, 2021: Expanded
6. Minnesota
State’s population without health insurance coverage in:
- 2021: 4.5%
- 2019: 4.9%
- 2010: 9.1%
State’s Medicaid expansion status as of Jan. 1, 2021: Expanded
5. Rhode Island
State’s population without health insurance coverage in:
- 2021: 4.3%
- 2019: 4.1%
- 2010: 12.2%
State’s Medicaid expansion status as of Jan. 1, 2021: Expanded
4. Hawaii
State’s population without health insurance coverage in:
- 2021: 3.9%
- 2019: 4.2%
- 2010: 7.9%
State’s Medicaid expansion status as of Jan. 1, 2021: Expanded
2. District of Columbia (tie)
District’s population without health insurance coverage in:
- 2021: 3.7%
- 2019: 3.5%
- 2010: 7.6%
District’s Medicaid expansion status as of Jan. 1, 2021: Expanded
2. Vermont (tie)
State’s population without health insurance coverage in:
- 2021: 3.7%
- 2019: 4.5%
- 2010: 8.0%
State’s Medicaid expansion status as of Jan. 1, 2021: Expanded
1. Massachusetts
State’s population without health insurance coverage in:
- 2021: 2.5%
- 2019: 3.0%
- 2010: 4.4%
State’s Medicaid expansion status as of Jan. 1, 2021: Expanded
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