A Boston accent is different from a New York accent, is different from a Missouri accent, is different from a Mississippi accent, is different from a Florida accent, is different from a Texas accent, is different from an Oklahoma accent, etc. Even within states, it fully depends on how rural you live, whether you went to college… hell, even your tax bracket in some cases.

I say this as an Australian that grew up in America: the sheer size of the place is enough to have something like fifty regional accents per state. Like everything with the US: it’s fucking insane.