Norfolk County, Massachusetts has the lowest rate of uninsured residents in the country at 2.4 percent, according to new data released Aug. 3 by the U.S. Census Bureau.
The new data is from 2021 and comes from the Small Area Health Insurance Estimates program, which is the only comprehensive source for single-year estimates of health insurance coverage in each of the country's 3,142 counties.
Between 2020 and 2021, the rate of Americans under 65 without health insurance decreased in 280 counties and increased in 80 counties. County uninsured rates ranged from 2.4 percent to 46.3 percent, with a median county uninsured rate of 10.4 percent.
The Northeast and Midwest had the nation's largest share of counties with uninsured rates below 10 percent, and the South had the largest share of counties with uninsured rates above 15 percent.
The nation's uninsured rate hit a record low of 7.7 percent in the first quarter of 2023, according to data published Aug. 3 by the CDC. The record rate does not reflect the millions of people removed from Medicaid during the redeterminations process, which began in April.
The county with the lowest uninsured rate in each state:
Norfolk County, Massachusetts: 2.4 percent
Los Alamos County, New Mexico: 3 percent
Carver County, Minnesota: 3.1 percent
Bristol County, Rhode Island: 3.3 percent
Oldham County, Kentucky: 3.7 percent
Warren County Iowa: 3.8 percent
Brown County, Illinois: 3.8 percent
Placer County, California: 3.9 percent
Erie County, New York: 4 percent
Chittenden County, Vermont: 4 percent
Honolulu County, Hawaii: 4.1 percent
Livingston County, Michigan: 4.1 percent
Waukesha County, Wisconsin: 4.1 percent
Middlesex County, Connecticut: 4.2 percent
Douglas County, Colorado: 4.3 percent
Calvert County, Maryland: 4.4 percent
Delaware County, Ohio: 4.4 percent
Falls Church City, Virginia: 4.4 percent
Hunterdon County, New Jersey: 4.6 percent
Westmoreland County, Pennsylvania: 4.7 percent
Loving County, Texas: 4.9 percent
Rockingham County, New Hampshire: 5 percent
Hamilton County, Indiana: 5.1 percent
Loup County, Nebraska: 5.1 percent
Pleasants County, West Virginia: 5.5 percent
Clackamas County, Oregon: 5.7 percent
Cumberland County, Maine: 5.8 percent
Williamson County, Tennessee: 5.8 percent
New Castle County, Delaware: 5.9 percent
St. Charles Parish, Louisiana: 6 percent
King County, Washington: 6.1 percent
St. Charles County, Missouri: 6.2 percent
Pierce County, North Dakota: 6.4 percent
Petroleum County, Montana: 7 percent
Sully County, South Dakota: 7.2 percent
Morgan County, Utah: 7.2 percent
Madison County, Idaho: 7.3 percent
Eureka County, Nevada: 7.7 percent
Sheridan County, Kansas: 7.7 percent
Shelby County, Alabama: 8 percent
Grant County Arkansas: 8.3 percent
Wake County, North Carolina: 9.2 percent
Fayette County, Georgia: 9.4 percent
St. Johns County, Florida: 9.7 percent
Richland County, South Carolina: 10 percent
Johnson County, Wyoming: 10.5 percent
Greenlee County, Arizona: 10.5 percent
Madison County, Mississippi: 10.9 percent
Haines Borough, Alaska: 11.1 percent
Canadian County, Oklahoma: 12.7 percent