I was going to make the same claim to Cuban Sandwiches, except I was going to say Tampa (which has a better claim then Miami)
And Dungeness crab. Mission-Style burritos. Irish coffee.
San Diego: Fish tacos. California-style burritos. Beer with weaponized levels of hopping.
Southern tier of New York, speedies, Cornell chicken, and salt potatoes.
Yeah, you’ll notice I said central Florida, which excludes Miami. 
And we could certainly get more specific, like Ybor City.
I’m delighted that the piece cited La Segunda Bakery, which I’ve got a long familiarity with, courtesy of my native Floridian wife. We just stopped there this past Sunday on the way from the airport. Got Cubans and a box of guava turnovers, of course. 
Latecomers, NYC was already organized by then, Bagel Bakers Local 338. They had standards!
I’m not establishing Montreal as the first, but rather rebutting “It existed in the New World almost exclusively in the NY metro area and didn’t start spreading across North America until the 1970s and didn’t get common until the 80s.” I suppose the “almost exclusively” leaves enough wiggle room, but Montreal is not just a random podunk town to be cast aside as a minor exception. Montreal style bagels are up there with New York bagels. Some would say better. I would just say different. (I personally prefer the NY bagel.)
I will concede your point. But there were over 300 bagel bakers in Brooklyn alone by 1910 or so. The bagel most people know and love in most places in North America and apparently Japan, is based on the NY style bagel perfected by NYC Jews of Eastern European descent. While the big chains mostly got it wrong, plenty of smaller shops are trying for the perfection known as a Bagel and their benchmark is the NYC bagel.
Not to speak for What Exit? but I think there’s a big difference between bagels being available almost exclusively in Jewish neighborhoods in New York, Montreal and the like, and being widely available in supermarkets across the continent.
Four Corners area of the Southwest: Indian Frybread.
Wonderful list, but a small correction - it’s a dirty water dog!
Wallet, life-time Brooklynite
What about the New York “chop[ed] cheese?”
:smack: Oy! I am ashamed. Of course you are correct.
I never heard of that one. But I’ve lived most of my life in Central Jersey, so I expected I missed a few.
It is a bit esoteric. Do you guys have “rippers” out there, or is that another part of Jersey? (Deep fried hot dogs). Also, the White-Castle-style slider is somewhere from your state, too.
St. Louis
Frozen custard
Toasted (actually deep fried) ravioli
Provel cheese
We may not be healthy, but we’re happy!
Also barbecue. I know, every place south of Iowa claims barbecue. But St. Louis has something called “pork steaks” (sliced pork butt) with a local tomato-based sauce that’s notably sweeter than either KC or Memphis style.
Gooey butter cake, too!
Don’t call them rippers, but some places have those. Please see the Italian Hot Dog.
Central Jersey’s big contributions:
Italian Hot Dogs: deep-fried hot dogs, with onions, peppers and fried potatoes.
Salt Water Taffy is a Jersey thing. Best Salt Water Taffy is made in Eatontown, NJ at Criterion Chocolates.
The Diner was actually invented here. We have over 500, more than any other state.
The Trenton Burger: A cheeseburger with a slice of pork roll on it.
We’re big on Cranberries but not even all of us know it.
Applejack, pretty much an Apple Brandy, goes back to 1698 in NJ.
But mostly we are in the shadow of NYC & Philly.
Can we try Texas?
Frito Pie
Chili Con Carni
Cheese enchaladas
(got those last night)
And that’s just the start
Okay, thank you Northern Mexico.
My small county has significant Serbian, Italian, Mexican, and Yankee populations, so hamburgers are standard.
An obvious one is Manhattan Clam Chowder.
Also, the bacon, egg, and cheese on a hard roll breakfast sandwich.
For what it’s worth, New York doesn’t have a distinctive style of pizza, either. Whenever New Yorkers try to describe it, they just end up describing American pizza, like you can find anywhere in the nation.