In the Rio Grande Valley, two counties have been identified as the least educated in the US. A report from WalletHub contains this information, although specific details are not provided here.

The rankings are based on data from 150 large metropolitan areas. Cameron County is mentioned as one of the ranked counties, but its exact ranking is not specified in the available information.

For more details on the WalletHub report and the rankings of the Valley counties, readers can refer to the original article, which provides further context and information on the education levels in the area.