the only "city" classified as such (30,000+pop) in my homebrew that is non human, is Crynaxia, elven lost city, sunken.
Aside from that the catacombs of dwarven enclaves and tribal miners is large but not centralised.
any further and you start travelling into deeper more strange areas, but most cities are human.
Orc City as well i guess, but thats tribes, priests, and such. They all congregate in the same area but theres no city government or other such items.