Well, now I'm in Chattanooga, TN. I rarely see it here (on rare, rare nights when I'm far outside the city limits and away from civilization I sometimes catch a glimpse of it). I lived in North Dakota and Missouri for most of my formulative years, and in both locations I could see it pretty easily. I could particularly see it well in North Dakota.
I could sometimes also see the Northern Lights when I lived in ND.