A few smaller ones that pop into my head are Boulder, Amarillo, Centralia (does that still count?), Slab city (not sure that counts either), Salem and Providence. Looking it up, the smallest proper city of these is Salem with 44k.
I could also probably name a ton of European city names and there will be small towns in the USA with that name, but that would kind of be cheating.
I was thinking of the one with the cracked roads and the fire burning below. So that's probably the former? Haven't actually heard of the massacre I think.
The witchy one! Funnily enough, when I googled it for the population number, I found that there's also a Salem in my home state of Baden-Württemberg in Germany. I had never heard of that one, despite having been within like 15km of it.