Don't forget Steel City, which is basically a coastal Pittsburgh (i c wat they did thar).

 

The "real life" location of Metropolis is up for debate. It was originally based on Toronto, but was first associated with Cleveland because Superman was created there, and many early Supes stories are set there. Officially, it's on the Atlantic coast (one DC publication puts it in Delaware) just across the bay from Gotham City, with the idea being that Metropolis represents everything good about NYC, and Gotham everything bad. That said, DC has changed the "location" of its cities to suit the needs of its stories in the past, and several Batman/Superman stories in both comics and animation have made it seem like Bruce Wayne going to Metropolis was a huge deal with him being far removed from Wayne Enterprises--not something you'd expect for someone making a two-hour drive from the Jersey Shore to southeastern Delaware.

---