Texas residents continue to be the most likely in the country to lack health insurance, followed by residents of Nevada and Alaska, according to surveys conducted during the first half of 2012 for the Gallup-Healthways Well-Being Index.
Roughly one in four residents in those states is uninsured.
People are least likely to be uninsured in Massachusetts, where just 4.1 percent of residents lack health coverage.
Nationwide, an average 17.2 percent of Americans lacked health insurance from January to June of this year, slightly above the 17.1 percent who were without coverage in 2011.
Adults living in the East and upper Midwest continue to be among the least likely to be uninsured. Residents of states in the South and West are still among the most likely in the country to lack health insurance coverage.
The geographic pattern partly reflects demographic and socioeconomic factors. Low-income and Hispanic residents are the most likely to be uninsured. States with larger percentages of these groups are generally more likely to have higher uninsured rates.