The Maine coast line is the longest coast line in the USA if you were to straighten it out into a straight line. Therefore, the answer to your question is that all the states have a smaller coastline when Maine is stretched out.
Certainly it has a longer ocean coastline then Kansas, Colorado or Wyoming but it has less then:
Maine
Because Hawaii is an Island State it has no land boundaries and has 100% coastline. Alaska has much more coatline but is not an Island and therefore has a much smaller percentage of coastline.
Maine has a longer coastline with the Atlantic ocean.
Maine shares the coastline of the Bay of Fundy with the Canadian provinces of Nova Scotia and New Brunswick.
Let's see. Maine, New York, New Hampshire, Connecticut, Rhode Island, Massachusetts, Delaware, Maryland, Virginia, North Caroline, South Carolina, Georgia, Florida. All of the eastern seaboard states from Maine to Florida are ON the Atlantic coast. No one can be any closer than the others.
Any landlocked state
Maine.
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Augusta, Maine.
Arizona