Tennessee or Missouri; both share borders with eight states.
Russia
No state borders 9 other states, the most borders any state has is 8 (Tennessee and Missouri)
Missouri and Tennessee both border the most states, 8.
Tennessee and Missouri they border eight other states
Brazil borders ten other countries. It borders every other country in South America except Ecuador and Chile.
Tennessee borders the most other U.S. states, with a total of eight neighboring states. It shares its borders with Kentucky, Virginia, North Carolina, Georgia, Alabama, Mississippi, Arkansas, and Missouri. This extensive connectivity makes Tennessee a significant geographical crossroads in the southeastern U.S.
South Australia :)
Both Tennessee and Missouri share borders with eight other states.
Tennessee borders eight other states: Kentucky, Virginia, North Carolina, Georgia, Alabama, Mississippi, Arkansas, and Missouri.
Missouri has to be one of them and Tennessee is the other.
Madhya Pradesh is the state in India with 9 borders with other states such as Gujarat, Maharashtra, Telangana, Chhattisgarh, Andhra Pradesh, Vidarbha, Bundelkhand, Uttar Pradesh and Rajasthan