the term is widely used among the population, not just the black population, in the mid-atlantic up to new york, chicago, and the south.

Sometimes soul food is conflated with Jamaican food (jamaican soul) but for the most part when I think soul food, I think, okra, ham hocks/hambacks, collard and turnip greens, fried chicken, catfish, biscuits, gravy, cornbread, etc. I can't vouch for all the stuff in that wikipedia list, some of it I thought huh?

Since I stopped eating meat except for one day a week, a lot of that has gone out the window.