Russia has over 20,017 km of land border with maximum 16 neighbors while China shares 22,147 km of land with 14 countries
Next, in line Brazil shares 14,691 km of land borders with ten countries – almost all the South America except Ecuador and Chile.
At number four India has a 14,209 km long border with 10 countries while both USA with 12,034 km and Kazakhstan (12,012 km) have a common border with five countries each.
Democratic Republic of Congo and Sudan have landline border with 10 and 7 countries respectively
Sri Lanka doesn’t have any land border but shares a maritime border with Maldives and India.
On the other hand Denmark has maritime borders with Sweden and Norway while Canada has sea boundaries with Denmark and France
The Vatican and San Marino are totally surrounded by Italy while Lesotho is entirely surrounded by South Africa.
Russia
Length of border: 20,017 km
No of countries: 16
Neighbors: Azerbaijan: 284 km, Belarus: 959 km, China 3,645 km, Estonia: 294 km, Finland 1,340 km, Georgia: 723 km, Kazakhstan: 6,846 km, North Korea: 19 km, Latvia: 217 km, Lithuania 227 km, Mongolia: 3,485 km, Norway: 196 km Poland 206 km, Ukraine: 1,576 km, Abkhazia: 241 km and South Ossetia: 74 km
China
Length of border: 22,147 km
No of countries: 14
Neighbors: Afghanistan (76 km); Bhutan (470 km); India (3,380 km); Kazakhstan (1,533 km); North Korea (1,416 km); Kyrgyzstan (858 km); Laos (423 km); Mongolia (4,673 km); Myanmar (2,185 km); Nepal (1,236 km); Pakistan (523 km); Russia (3,645 km); Tajikistan (414 km); and Vietnam (1,281 km).
Brazil
Length of border: 14,691 km
No of countries: 10
Neighbors: Argentina: 1,224 km, Bolivia: 3,400 km, Colombia: 1,643 km, French Guiana 673 km, Guyana: 1,119 km, Paraguay: 1,290 km, Peru: 1,560 km, Suriname: 597 km, Uruguay: 985 km, and Venezuela: 2,200 km
India
Length of border: 14,209 km
No of countries: 10
Neighbors: Afghanistan: 106 km, Bangladesh: 4,053 km, Bhutan: 605 km, China: 3,380 km, Myanmar: 1,463 km, Nepal: 1,690 km (1,050 mi), Pakistan: 2,912 km and Sri Lanka: 0.045 km on a land shoal known as Adam’s Bridge. India also shares water borders with Sri Lanka, Maldives, Thailand, and Indonesia.
USA
Length of border: 12,034 km
No of countries: 5
Neighbors: Canada (4): 8,893 km and Mexico: 3,141 km
Kazakhstan
Length of border: 12,012 km
No of countries: 5
Neighbors: China: 1,533 km, Kyrgyzstan: 1,051 km, Russia: 6,846 km, Turkmenistan: 379 km, and Uzbekistan: 2,203 km
Democratic Republic of Congo (DRC)
Length of border: 10,730 km
No of countries: 10
Neighbors: Angola 2,511 km, Burundi: 233 km, Central African Republic: 1,577 km, Republic of the Congo: 2,410 km, Rwanda: 217 km, South Sudan: 628 km, Tanzania: 459 km, Uganda: 765 km, and Zambia: 1,930 km
Argentina
Length of border: 9,665 km
No of countries : 6
Neighbors: Bolivia: 832 km, Brazil: 1,224 km, Chile 5,300 km, Paraguay: 1,880 km, and Uruguay: 579 km
Canada
Length of border: 8,893 km
No of countries : 4
Neighbors: United States (4): 8,893 km
Pakistan
Length of border: 6,774 km
No of countries : 4
Neighbors: Afghanistan: 2,430 km, India: 2,912 km, Iran: 909 km, China: 523 km
Sudan
Length of border: 6,764 km
No of countries: 7
Neighbors: Central African Republic: 483 km, Chad: 1,360 km, Egypt: 1,273 km, Eritrea: 605 km, Ethiopia: 723 km, Libya: 383 km, and South Sudan: 1,937 km
Uzbekistan
Length of border: 6,221 km
No of countries: 5
Neighbors: Afghanistan: 137 km, Kazakhstan: 2,203 km, Kyrgyzstan 1,099 km, Tajikistan 1,161 km, Turkmenistan: 1,621 km
