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 Netherlands
76%
7%
7%
7%
13
flagthe United States
75%
14%
5%
1%
132
flagCanada
75%
10%
4%
4%
82
flagGermany
69%
14%
4%
10%
222
flagPoland
65%
14%
8%
9%
3582
flagGreece
63%
27%
9%
0%
11
flagthe United Kingdom
57%
23%
7%
10%
68
flagAustralia
56%
37%
6%
0%
16
flagIndia
52%
33%
9%
4%
21
flagSwitzerland
52%
19%
4%
19%
21
flagAustria
50%
34%
0%
15%
26
flagFrance
36%
18%
36%
9%
11