Texas and Oklahoma, with about a 570 mile border. California and Nevada are not far behind, with about a 550 mile border.
Got this from About.com:
The border between Texas and Oklahoma meanders peacefully along 540 miles of twists and bends of the storied Red River.
Though the Red River serves as most of the TX-OK border, it's just part of the border. In a Sporcle quiz, they claim the border to be 715.4 miles. There's a link provided that lists the length of all the states borders, but it doesn't say who provided the information. I can't find any official number in terms of the border's complete length in miles. Can anyone else? Thanks.
Oklahoma and Texas
New Mexico - Utah and Arizona - Colorado with 0 miles or kms
The provinces that share the shortest border in Canada are British Columbia and Alberta. The border between the two provinces is only around 19 kilometers long.
Alaska and Hawaii are the only two states that do not share a border with another state.
It depends. The two states border each other, so the shortest distance between them is zero miles at the border.
California and Oregon did not share a border with the 21 other Union states.
There is only a short distance between Florida and Georgia. The shortest distance between the two states is 416 miles.
No two US states share a northern border with Maine.
Georgia and Florida share Alabama's eastern border.
i am peatty shure that it is eroupe and asia... (edwardlover)
North America and South America share a land border with the United States.
No US States, however two Canadian Provinces share border and there is a maritime border with Russia.
New Jersey and Delaware at 1.4 miles. This is due to a small portion of Delaware being contiguous to New Jersey due to something called the Twelve Mile Circle. The second shortest at 22.6 miles between Delaware and Pennsylvania is also determined by this arrangement.