Why some states are called The Mid-Atlantic States when They Are Not in the ocean?

Don't worry about it, pay no attention to the unexplainable things; think about this: USA thinks "America" is their country, that there's No Central America, that 85% of their High School graduates cannot Read, Write in Cursive, Do Basic Math, and "0" in Geography, etc, etc, etc.

One more of those weird, unexplainable "American", I mean USA's things.

An 1897 map displays an inclusive definition of the Mid-Atlantic region, including Delaware, New Jersey, New York, Pennsylvania.

Frederick Jackson Turner wrote in 1893 about the important role the Mid-Atlantic or "Middle region" had played in the formation of the national American culture, and defined it as "the typical American region".[8]

“ The Middle region, entered by New York harbor, was an open door to all Europe. The tide-water part of the South represented typical Englishmen, modified by a warm climate and servile labor, and living in baronial fashion on great plantations; New England stood for a special English movement-- Puritanism. The Middle region was less English than the other sections. It had a wide mixture of nationalities, a varied society, the mixed town and county system of local government, a varied economic life, many religious sects. In short, it was a region mediating between New England and the South, and the East and the West. It represented that composite nationality which the contemporary United States exhibits, that juxtaposition of non-English groups, occupying a valley or a little settlement, and presenting reflections of the map of Europe in their variety. It was democratic and nonsectional, if not national; "easy, tolerant, and contented;" rooted strongly in material prosperity. It was typical of the modern United States. It was least sectional, not only because it lay between North and South, but also because with no barriers to shut out its frontiers from its settled region, and with a system of connecting waterways, the Middle region mediated between East and West as well as between North and South. Thus it became the typically American region. Even the New Englander, who was shut out from the frontier by the Middle region, tarrying in New York or Pennsylvania on his westward march, lost the acuteness of his sectionalism on the way. ”

—The Frontier in American History

It's just one of those history thingies, like the Pennsylvania Dutch not being Dutch but really German

Those st8s ain't in the ocean; they're on the ocean. VA & WV can get a bit confusing as those states are usually identified as Southeastern states. But sometimes MD & DE are also classified as Southern states based on the fact that they're on the Dixie side of the Mason-Dixon line & were border states during the Civil War, ahem, War of Northern Aggression. But frankly, I'd rather identify Maryland & Delaware as East Coast states. Their accents aren't quite as southern as Texans, Floridians, or even Virginians.

The reason they are called the mid-atlantic states is because, they are in the middle of the east coast.

nicely, I already stay in a style of... yet while i did not, and if I had to determine from one, i'd circulate with Virginia, someplace alongside the coast would be super. And Vermont is in New England, stupid.