depression in your area

This isn't so much related to pregnancy (well I guess it could be). I am just curious to get some input from people around the world. Is depression common in your area? I understand depression is a chemical imbalance in the brain but this could be caused by cold dark seasons or areas with little sunlight that rain a lot. I do suffer from depression but I've come to realize that almost everyone in my area has moderate-severe depression (central Pennsylvania). I've always though if I could live in Florida or somewhere near a beach I'd feel happier but I wonder if this would still be true if I was there every day. Any feedback would be awesome!!