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
flagRepublic of Ireland
85%
14%
0%
0%
14
flagthe United States
76%
13%
4%
1%
123
flagthe Netherlands
76%
7%
7%
7%
13
flagCanada
75%
12%
5%
5%
74
flagGermany
69%
14%
5%
11%
171
flagPoland
65%
15%
8%
9%
3387
flagGreece
63%
27%
9%
0%
11
flagthe United Kingdom
57%
22%
8%
10%
57
flagAustralia
56%
37%
6%
0%
16
flagSwitzerland
56%
12%
6%
18%
16
flagIndia
52%
31%
10%
5%
19
flagAustria
40%
40%
0%
18%
22