Oklahoma shares most of Texas's northern border.
Tennessee.
Oklahoma
u.p. 9 states Delhi,m.p,jharkhand,bihar,chattisgarh,rajasthan,haryana,uttrakhand,h.p.
Missouri and Tennessee border eight states, the most of any.
South Australia borders the most states and territories in Australia. South Australia shares borders with Western Australia, the Northern Territory, Queensland, New South Wales and Victoria.
The most northern of the southern states in the United States of America is the state of Maryland. Although not usually considered a southern state, the state of Delaware may also be the northernmost of the southern states as it shares a northern border with Maryland.
There are 3 states & all of them share their land boundaries with 3 other countries-Arunachal Pradesh (shares boundary with Bhutan,China & Myanmar) West Bengal (shares boundary with Nepal,Bangladesh & Bhutan) Sikkim (shares border with Nepal,China & bhutan)
Israel shares most of its eastern border with JORDAN.
Kentucky and Colorado are tied at the most with seven border states.
Delaware (perhaps the most overlooked border state), Kentucky, Maryland and Missouri were the border states that did not secede from the Union.
South Australia :)