12 nautical miles or about 14 statute miles from the outermost points of land at low tide
International waters are about 50 miles away from any countrys shore line. Once in international waters do what ever you want make your own laws. International waters do not start till 200 miles from the United States Coast Line and you still better not try and do what ever you want.
I believe that state waters in Florida, Texas, and Puerto Rico extend out to 9 miles with the exception of the Atlantic side of Florida where it ends at 3 miles. Federal waters end at 12 nautical miles offshore of the US. HOWEVER, there is a 24 mile US contiguous zone and a 200 mile exclusive economic zone in which some laws still do apply. If you are planning on doing something sketchy, go really far offshore or talk to a lawyer.
International waters are about 50 miles away from any countrys shore line. Once in international waters do what ever you want make your own laws. International waters do not start till 200 miles from the United States Coast Line and you still better not try and do what ever you want.
Puerto Rico is an island therefore it does not have a land border with any other country. The Dominican Republic is 90 miles to the west of Puerto Rico across the Mona Straight. That is the only foreign country that is even close to sharing a border with Puerto Rico. And since the US Territorial Waters only extend 12 nautical miles, the island's territorial waters do not border with any other country. The US Virgin Islands are about 50 miles to the East of the Puerto Rican coastline. Puerto Rico and the US Virgin Islands are both territories if the United States so there is no national border there even in the territorial waters they share. The US Virgin Island's territorial Waters border the British Virgin Islands Territorial waters. That would be the nearest international boundary to Puerto Rico.
Depend on location, 3-250 miles
In the Gulf of Mexico, it is generally 7-10 miles offshore. I think that 12 is the global standard,
The border between Canada and the United States is the longest international border in the world, stretching over 5,500 miles.
The Texas-Mexican border is approximately 1254 sq. miles.
International waters, also known as the high seas, begin 12 nautical miles (approximately 22.2 kilometers) from a country's coastline. Within this 12-nautical-mile zone, a nation has sovereignty over its territorial waters. Beyond this limit, the waters are considered international, where no single nation has jurisdiction, allowing for free navigation and fishing, subject to international law.
Yes, Maine has a larger international border than Vermont. Maine shares a 611-mile border with Canada, while Vermont's border with Canada is approximately 90 miles long. This makes Maine's international boundary significantly longer than that of Vermont.
The 12 mile rule that I am familiar with is the international agreement that the waters within 12 miles of shore are part of the country that the shore belongs to. Outside of the 12 mile limit, is international waters. Some countries contest that it is much larger than 12 miles.
Little Diomede Island (Alaska) is 2.4 mile from Big Diomed (Russia) and the Maritime border and the International Dateline passes midway between the two making the distance between the two countries 1.2 miles apart.