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Have there been any instances where one US state has exchanged or ceded land to another US state, subject to the conditions below? If so, what led the exchange?

Conditions:

  • I'm asking about states, not territories
  • The exchange or cessation is not related to the creation of a state or territory
  • It's voluntary
  • It's not the result of something like a border dispute, due to inaccurate maps at the time of demarcation
  • It's not the result of a shifting river or other natural feature used for demarcation
  • It's a "significant" amount of land--so let's say at least a few square miles (I'm more interested in larger land exchanges but don't want to list an arbitrary number here--this is more to exclude the type of exchange where I read that Minnesota gave 20 acres of land to North Dakota in 1961 here.

I couldn't find any examples in a quick look over the wikipedia page on territorial evolution of the US, but perhaps I missed something or the page isn't comprehensive.

Edit: Perhaps these conditions seem arbitrary, but I'm looking for any cases where, for example, land was exchanged for money or other land which is mutually beneficial for both states, without explicitly limiting myself to those circumstances. This question was influenced by reading about the Toledo War where Michigan gave up the Toledo strip to Ohio in order to gain statehood, but got the upper peninsula from congress in exchange. Maybe there were times when already incorporated states had similar land gain?

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    I'm a bit curious about the rationale behind this seemingly arbitrary set of rules. You seem to be attempting to exempt any conceivable reason why a state would give up land. I'm a bit worried that with that as the goal, if someone actually managed to come up with something, It'd just be greeted with an edit and a new rule. – T.E.D. Aug 3 '18 at 16:54
  • Please do not use comments for discussion. Comments request clarification; clarifications should be edited into the question. This ensures that the question contains all the relevant information. – Mark C. Wallace Aug 3 '18 at 17:09
  • @T.E.D. what? Why are you assuming I'm going to edit more conditions onto my question to exclude answers? I just wrote my question with those bullet points so it would be easier to read and comprehend. – spacetyper Aug 4 '18 at 19:30
  • What about things that happened in colonial times? – Spencer Aug 4 '18 at 23:35
  • @Spencer That's totally fine, as long as it's not pertaining to territories. – spacetyper Aug 4 '18 at 23:57
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Ellis Island, part of New York State, was expanded significantly over the years by fill. There was no problem with the original demarcation or surveying, but the water surrounding the island was within New Jersey, which claimed ownership of that reclaimed land. The Supreme Court eventually ruled that New York had jurisdiction to the original island and New Jersey to the fill land. The states then made a voluntary agreement to draw a borderline, i.e., to identify the territory to be ceded to New Jersey. New York had to abandon its claim to the fill, including the entire perimeter. The cession was a significant 22.8 acres.

Ellis Island

  • Very interesting! It's quite a bit smaller than a sqaure mile, but it's a significant location. – spacetyper Aug 3 '18 at 20:36
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The Wikipedia article on West Virginia makes it appear that Berkeley and Jefferson counties were not originally part of the state and subsequently (but in quick sequence) asked to be annexed to it, which was allowed. Whether this counts as a "voluntary" transfer from Virginia to West Virginia will depend on your perspective on the Civil War. Also, the Wikipedia article is ambiguous. You'd have to do a bit more digging to see if this was really a post-WV-statehood transfer.

Two major land changes that don't quite meet your criteria but that did have a significant impact on long-standing state borders are the Platte Purchase, which added over 3,000 square miles to Missouri 16 years after it became a state, and the reversion to Virginia in 1846 of the District of Columbia west of the Potomac...only 31 square miles, but a very important 31 square miles.

  • It would be interesting to calculate how many people live in that reverted area (and thus would have been disenfranchised along with the rest of DC today). – T.E.D. Aug 4 '18 at 18:05
  • Might to tough to say. I don't think the southern-most portion of the old border follows a current political boundary, as it bisects Alexandria. You might need to go to Census block group level or even block level to get a precise answer. – C Monsour Aug 4 '18 at 18:15
  • Eyeballing it, if it doubled DC's population, that would make a theoretical State of DC more populous that 10 other states. It probably isnt' nearly as densely populated as the real DC though. – T.E.D. Aug 4 '18 at 18:20
  • It's between 230000 and 390000, probably closer to the latter, depending how many Alexandians are inside the square. That may actually make it more densely populated than DC, which is still nearly 69 square miles (not all of them dry land) and has about 690000. – C Monsour Aug 4 '18 at 18:27
  • That would make this entirely fictitious "State of O.G. D.C." in my head somewhere between the 42nd and 45th largest state, with one or possibly two Congressional representatives. – T.E.D. Aug 7 '18 at 15:34

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