No. 8: South Dakota
Strengths: Low taxes, low crime rate
Although temperatures in South Dakota can get downright frosty, retirees may warm up to the idea of living here based on the money they can save. South Dakota boasts the third-lowest tax burden in the country -- a big draw for penny-pinchers.
The state also has an impressive health care system and minimal crime. According to FBI crime statistics, South Dakota's property and violent crime rates both fell by nearly 8 percent from 2012 to 2013, and its property crime rate ranked as the fourth-lowest in the country in 2013.
As if that weren't enough to lure retirees, there's never a shortage of places to explore in South Dakota, such as Mount Rushmore National Memorial, the Black Hills and Badlands National Park, which spans 244,000 acres and is home to fossils of extinct mammals like the saber-toothed cat.