Can cities in different states merge?

I have never seen a single city that is located in two states. Jersey City, for example, is separate from NYC, but could it merge with NYC if officials of both cities agreed? Or does it violate states laws? I know there are cities that border each other, have same names, and located in different states, but they... show more I have never seen a single city that is located in two states. Jersey City, for example, is separate from NYC, but could it merge with NYC if officials of both cities agreed? Or does it violate states laws? I know there are cities that border each other, have same names, and located in different states, but they are still 2 independent cities. Why is that?
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