Wikipedia has a lengthy list of savoury pies. I count nine or ten on the list that I've had in the U.S., mostly in "ethnic" celebrations or restaurants. On the list, the ones I see most commonly are calzone, empanada, knish, pasty, pirozhki (various spellings & ethnicities), quiche, samosa, and spanakopita. The only all-American savoury pie that I know of is the pot pie - usually chicken, turkey, or beef stew inside a pie crust. Home-made pot pies are really good, and you can buy really bad frozen pot pies really cheap.

I've had both Polish and Russian pirozhkis. There's a White Russian community in Fresno (California) that makes "beerocks" (I think the name is a variant of pirogi) - they're like dinner rolls with spiced meat baked inside. If you're ever in Fresno, try the beerocks and the Armenian and Basque food.

-Joe-