Newport County, Rhode Island: Is This The Only County In The USA That Shares A Land Border With Another State, But Doesn't Share A Land Border With Another County In Its Own State?

Newport County, Rhode Island: Is This The Only County In The USA That Shares A Land Border With Another State, But Doesn't Share A Land Border With Another County In Its Own State?

It shares a land border to the east with Bristol County, Massachusetts. Its border with the adjacent Bristol County, Rhode Island is a water border, so that doesn't count. Now there are several counties in the USA that are islands and thus don't share land borders with anything -- the counties in Hawaii, for example, as well as San Juan County and Island County in Washington State. Accomack County, Virginia would fit the bill here if it weren't bordered to the south by Northhampton County, Virginia. All you geography buffs out there, have I missed anything?

Comments

[CT]

I can see you've stumped the geography mavens. I've looked at the prime suspects around the US map -- i.e., state borderlands abutting major bodies of water -- and haven't found exactly what you're looking for. But a couple of thisclose contenders:

- Richmond County, NY: This is Staten Island, which yes, is an "island". But it's surrounded by New Jersey, and the Arthur Kill River on its western border is a notably shallow waterway; you can practically wade across it.

- Grand Isle County, VT: The only mainland portion of this county does not border the rest of Vermont, nor any other state -- just Quebec/Canada to the north. It's the only county in such a position.