It is certainly debatable, some lists include it and some don't. Baltimore is not in the traditional industrial heartland or even the Midwest, but it's economic

It is certainly debatable, some lists include it and some don't. Baltimore is not in the traditional industrial heartland or even the Midwest, but it's economic makeup in the mid-20th century is very similar to traditional Rust Belt cities (large ports, metal production, manufacturing). includes - https://www.thoughtco.com/rust-belt-industrial-heartland-of-the-united-states-1435759 https://www.thoughtco.com/rust-belt-industrial-heartland-of-... doesn't include - https://en.wikipedia.org/wiki/Rust_Belt https://en.wikipedia.org/wiki/Rust_Belt