Over the next 20 years, researchers say, South Dakota's population will go up about 140 thousand people. 75 percent of that growth will be in the 65 and older age group.
Researchers say this will have a great impact on the state's economy.
"Those baby boomers, aren't buying what they did when they were teenagers. Now there are different areas that they are into, travel for example, the purchase of things for leisure, things for free time are increasing and will affect the economy significantly," said Dr. Sid Goss, Professor Emeritus at South Dakota School of Mines.
Goss says the aging population in South Dakota will be a little more dramatic than the rest of the country.