Seafood? Cow? Wild Game? All fit in with things regional here.
Um, there're these danish hotdogs that are encased in red dyed intestine that I'm absolutely addicted to, and I get them from a large Danish transplant community down south. Green boiled peanuts are a roadside delicacy in the southern American states.
My area's such a melting pot of cultures that I ate a few things my parents grew up on and the rest of my dietary needs were fulfilled by the thousands of immigrants from all over that settled in our area. Wasn't a day someone didn't bring over a new dish for us to try, and us likewise with them.
I'd say barbecue is a local dish, but some people may say Texans don't do it properly (I've learned that sauce turns out to be the biggest argument in the barbecue circuit.)