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
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.
i am peatty shure that it is eroupe and asia... (edwardlover)
No US States, however two Canadian Provinces share border and there is a maritime border with Russia.
Kansas and Oklahoma
California and Nevada
Oregon and Washington
Montana and Wyoming