The United States of sales tax, in one map

After we posted a map of state income tax rates earlier this week, we heard back from many readers who were also interested in seeing state sales tax rates in order to get a more complete fiscal picture.

To that end, here's a handy map from the  free market-oriented Tax Foundation on which you can find a combination of the state sales tax rate and the average local rate as of the middle of 2013. (Click on the map to go to a chart of the sales tax rate in each state.)

(Map via the Tax Foundation Web site.)

(Map via the Tax Foundation Web site.)

A few observations:

* Three of the five states with the highest combined rates are in the South (Tennessee, Arkansas and Louisiana).

* The difference between the state with the highest combined rate (Tennessee) and the lowest one (Alaska) is nearly 8 percent (7.75 percent to be exact). This doesn't account for states with no tax, of course.

* While Tennessee has the highest combined sales tax rate, it has no income tax (save for taxes on income from interest and dividends).

* Washington state has no income tax but one of the highest combined sales tax rates.

If you want to view them alongside one another, here's the income map we posted. It came from the accounting firm O'Connor Davies.

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