Which countries share the longest land border?

USA-Canada
Russia-China
Russia-Kazakhstan
Argentyna-Chile
The border between United States and Canada is the longest one between two states. It measures 8,893 km (5,525 mi).
smyru
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Very interesting!

Answers by country

USA-Canada
Russia-China
Russia-Kazakhstan
Argentyna-Chile
answers
flagCanada
85%
6%
2%
4%
49
flagRepublic of Ireland
83%
16%
0%
0%
12
flagthe United States
76%
13%
5%
1%
106
flagGermany
68%
13%
5%
11%
117
flagPoland
63%
15%
8%
10%
2963
flagGreece
63%
27%
9%
0%
11
flagAustralia
60%
33%
6%
0%
15
flagSwitzerland
58%
8%
0%
25%
12
flagthe United Kingdom
53%
27%
6%
11%
43
flagIndia
42%
35%
14%
7%
14
flagAustria
40%
40%
0%
20%
10