In my map of people ages 65 or older, there were much more older people in the Midwest and North West. The map was very dark in areas like Montana, Nebraska, North Dakota and South Dakota. Also the northern portion of Michigan, and some areas in Arizona and New Mexico are heavily populated by the elderly. The lighter area of the map was the South, East Coast, and almost all of Alaska. There is one big area in the West that has very few old people, which is the Western edge of the Rocky Mountains in northern Utah, southwestern Wyoming and western Colorado.
The reason why there are more old than young in certain places is explainable. There are more young families moving to the Southern portion of the US, and so the percent of old people will go down. Also some older people don’t want to move from where they were born, and the Northern US was more populated back when these people were born, causing the percent in the North to be much higher. In Alaska, the terrain and way of life is probably too much for the elderly, so that explains the lack of old people there, and that is probably the case for the Western Rocky Mountains also.
The effect of having more young people in the South and old people in the North will have a big effect. It will cause the Southern economy to grow, and the Northern economy to slow down. It will also make the social security taxes be higher in the North than the South, which will make living in the North more expensive, which will in turn cause the Northern population to go down when the older people start to die.
