Arkansas
The cost of living in Arkansas is low (the second-lowest in the country) and the retirement communities in it are some of the most active in the United States. With affordable housing, a low property tax burden, very rich scenery, and a reasonable amount of community events to keep you from becoming dormant, this state is one of the best to retire in the country.
The state has a very good healthcare system too. In a survey carried out by MoneyRates [3], Arkansas ranked the highest in terms of healthcare affordability and the tenth highest in terms of its nursing capacity.
The major drawback to living in this state is the relatively high crime rate. It helps to research communities thoroughly before moving into them so you can pick the safest ones.