With Mexico:
Texas, New Mexico, Arizona and California.
With Canada:
Alaska
Washington
Idaho
Montana
Minnesota
New York
Vermont
Maine
In the south, Texas, Arizona, New Mexico and California border with Mexico.
In the north, Alaska, Washington, Idaho, Montana, North Dakota, Minnesota, Michigan, New York, New Hampshire, Vermont and Maine border Canada.
Canada or Mexico
Washington State, Idaho, Montana, North Dakota, Minnesota, New York, Vermont, New Hampshire, Alaska and Maine all have land border with another country
Germany has a land border with Denmark.
13 states border Canada (4 by land, 3 by water*, 6 by both land and water+)Maine+, New Hampshire+, Vermont+, New York+, Pennsylvania*, Ohio*, Michigan*, Minnesota+, North Dakota, Montana, Idaho, Washington+, and Alaska.4 states border Mexico (1 by water*, 3 by land)California, Arizona, New Mexico, and Texas*.Florida shares a disputed claim of territorial water border with The Bahamas and Cuba.
The question does not make sense. All of the states of Australia share a border with another state. Even Tasmania, the island state, shares an actual land border as well as a water border with another state.
The only country that borders Canada on land is the United States. American states that border Canada on land include Washington, Idaho, Montana, North Dakota, Minnesota, Michigan, New York, Vermont, New Hampshire, and Maine.
The Following States border CanadaMaineNew HampshireVermontNew York (Land and Water Border)Pennsylvania (via Lake Erie),Ohio (via Lake Erie),Michigan (Detroit River, Lake Huron, Lake Superior)MinnesotaNorth DakotaMontanaIdahoWashingtonAlaskaThe Following States border MexicoTexasNew MexicoArizonaCaliforniaBorder RussiaAlaska (Via Bearing Strait)The BahamasFlorida (via Florida Straits)
There are two: Hawaii and Alaska. Neither shares a land border with any other US state.
The only country Denmark has a land border with is Germany to the south.
Not in land border but in water border, yes.
Sweden's longest land border is with Norway. Finland is the only other country with which Sweden has a land border, although only a narrow waterway separates Sweden from Denmark.
Illinois shares land borders with several other US states and one of the Great Lakes, but does not share a border with another country. It is possible, though, to travel by boat from Illinois to Canada.