As you can see, the map gets pretty dark (meaning there's more stress) in the Southern states, which make up much of the top 10. Louisiana led the South and the country in stress, coming in fourth for work-related stress, third for money-related stress, eighth for family-related stress, and third for health- and safety-related stress. Arkansas, Oklahoma, Alabama, and Tennessee also scored high in those categories.
On the other end of the spectrum, Minnesota came in first for the least-stressed states, which could be attributed to it having the lowest-money related stress of any state. Another reason could be how soothing that accent is. In general, it looks like places some might consider on the less, well, exotic -- like North Dakota and South Dakota, Nebraska, and Iowa -- all came out with low-stress levels, and that doesn't seem like a coincidence. Excitement and low stress don't necessarily go together.
But again, the people are supposed to be super-nice in Minnesota.