What is the most uneducated county in US?

According to the United States Census Bureau, the least educated county in the United States is Owsley County, Kentucky. As of the 2020 census, only 70.7% of adults in Owsley County have a high school diploma or equivalent, compared to the national average of 88.0%. In addition, only 5.0% of residents have any type of college degree, compared to the national average of 34.1%.