As the Office of Legislative Research detailed in a recent report, Connecticut has the highest tax rate in the nation on diesel fuel.
In Connecticut, you pay 46.2 cents in taxes every time you buy a gallon of diesel fuel. The good news is that, while high, the state's tax rate on gasoline is not the highest - North Carolina has that honor with a tax rate of more than 39 cents on the gallon, compared to this state's lowly 25 cents per.