[OldHand2018]

What is a coastal state?

Nearly 100% of Michigan is 150 miles or less from an international border that is in navigable waters. Is it a coastal state?

[rafram]

No, because nobody talks about the “north coast.”

[dragonwriter]

Yes, the great lakes are usually included as coasts (when not included, their exclusion is typically explicitly noted.)

[OldHand2018]

Exactly. I got downvoted unfortunately, which means that at least someone thought it was a ridiculous question. It's not.

Navigable Waters of the United States has a specific legal definition [1] and it has nothing to do with whether it's salt water or fresh water. So the question of whether a particular state is "coastal" based on proximity to salt water a valid question!

[1] https://www.law.cornell.edu/cfr/text/33/2.36