What region of US calls soft drinks pop, not soda or coke?

It might be more of an age thing. We old people grew up saying POP for soda pop(ular).

Well up north like pretty much the whole north side says Pop (I'm from Iowa so I say Pop)

The south says Soda or Coke. (I live in Texas.)

Not just the Midwest, although my buddy from Idaho says pop. Up where im from (Buffalo NY) it is said as well. Not sure about the New England area or other surrounding places.

People I knew from PA said "pop", but it's hard to tell if that's a Pennsylvania thing because most of them were in the military and could have picked it up anywhere.

Midwest/north thing, I grew up in Idaho and everyone says it, but now I live in texas and say coke

I think so. When I visited states like Kansas they called it pop.