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
87%
5%
2%
2%
39
flagthe United States
75%
15%
4%
2%
92
flagGermany
66%
15%
7%
9%
71
flagPoland
63%
16%
8%
10%
2623
flagGreece
63%
27%
9%
0%
11
flagSwitzerland
60%
10%
0%
20%
10
flagthe United Kingdom
45%
29%
9%
16%
31
flagAustralia
40%
50%
10%
0%
10
flagIndia
40%
50%
10%
0%
10