I'm a little east and a little closer to the sea than Jackie, so it's not me.

Tsuwm, what about the Hudson Bay? You're closer to that than the Atlantic, right? That's kind of like the sea.

And I think South Dakota is only the geographic center if you include Alaska, which doesn't do much for you if you're looking for distances from the ocean. I think the geographic center of the 48 contiguous is in Nebraska.