List of landlocked US states

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A landlocked state in the United States is any state whose territorial boundaries do not touch an ocean. All landlocked states are located among the contiguous 48 states on the North American mainland.

If you must travel through only one other U.S. state or one Canadian province to reach an ocean, the state is singly-landlocked. If you must travel through two U.S. states, or one U.S. state and one Canadian province, the state is doubly-landlocked. If you must travel through three U.S. states, or two U.S. states and one Canadian province to reach an ocean, the state is triply-landlocked.

Of the 50 states, 23 are coastal and one is completely insular (Hawaii). Of the remaining 26 states and the District of Columbia, 16 states and the federal capital are singly-landlocked, 10 are doubly-landlocked and one is triply-landlocked.

This is a list of the 16 singly-landlocked states and the District of Columbia, with routes to their nearest ocean:

This is a list of the 10 doubly-landlocked states with routes to their nearest ocean:

  • Colorado - New Mexico or Oklahoma, then Texas, to the Gulf of Mexico
  • Illinois - Michigan (water boundary) then Ontario to James Bay
  • Indiana - Michigan then Ontario to Hudson Bay
  • Iowa - Minnesota then Manitoba or Ontario to James Bay or Hudson Bay
  • Kansas - Oklahoma then Texas to the Gulf of Mexico
  • Missouri - Arkansas then Louisiana to the Gulf of Mexico
  • South Dakota - Minnesota then Ontario to James Bay, or North Dakota then Manitoba to Hudson Bay
  • Utah - Idaho then British Columbia, Washington or Oregon to the Pacific Ocean; or, Nevada or Arizona, then California to the Pacific Ocean.
  • Wisconsin - Michigan or Minnesota, then Ontario to James Bay or Manitoba to Hudson Bay
  • Wyoming - Idaho then British Columbia, Washington or Oregon to the Pacific Ocean

Nebraska is the only triply-landlocked state. To reach an ocean from Nebraska, one must travel either south through Kansas, Oklahoma, and Texas to the Gulf of Mexico; or north through South Dakota, North Dakota and Manitoba to Hudson Bay.

Eight states border the Great Lakes but New York is the only one that borders both the Great Lakes and an ocean. The other seven are singly-landlocked, except Wisconsin which is doubly-landlocked. Michigan and Ohio both have water boundaries with Ontario, which bounds the Arctic Ocean. Wisconsin's territorial waters in Lake Superior, however, do not touch those of Ontario but they form the southerly point of a three-way water boundary with Michigan and Minnesota.

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http://www.glerl.noaa.gov/pr/ourlakes/lakes.html