These are the least taxed states (not in order) Kiplinger has made a list of total taxation. This includes income, sales, property, fuel, sin, inheritance, wireless, travel taxes and also the fiscal condition of the state. They look at the balance sheet and how well they can sustain their current tax situation. Many other studies only look at two or three metrics but in terms of an overall metrics Kiplinger seems to be the best.
Here is the list (not in order): I'm going East to West.
It is quite interesting that when other studies that don't take a total taxation approach it makes an impression in some states that seem to be a good idea to move but lacking in property taxes as a factor or gas taxes. Of course some states are better than others in certian situations, how one wants to spend their money and what not. But generally speaking the states that are listed above are in fact decent states to live in terms of taxation. Like North Dakota it has an income tax but that doesn't make it a "high taxed" state. Overall it is one of the least taxed states. This is why one must look at the whole context of taxation.