The entire western boundary of Kansas is included in the border of Colorado.
Nebraska has a south-western border with Colorado and eastern border with Iowa.
New Mexico''s northern border is shared with Colorado.
New Mexico
Kentucky and Colorado.
Oklahoma
The Colorado River forms the border between California and Arizona.
Kansas shares its borders with Colorado, Nebraska, Missouri, and Oklahoma.
Maine, it shares a border with Vermont.
Oklahoma City is the capital and largest city in the U.S. state of Oklahoma, the state that shares is long southern border with Texas.
Connecticut is north of New York's maritime border
There is no Australian state which shares a border with all other states. No state except for Victoria shares a land border with Tasmania. South Australia shares a border with all mainland states and the Northern Territory.