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%
150
flagCanada
75%
11%
5%
4%
89
flagGermany
68%
15%
5%
10%
255
flagPoland
65%
14%
8%
9%
3735
flagGreece
63%
27%
9%
0%
11
flagAustralia
61%
33%
5%
0%
18
flagItaly
60%
40%
0%
0%
10
flagSwitzerland
59%
18%
3%
14%
27
flagthe United Kingdom
58%
21%
6%
10%
73
flagAustria
56%
30%
0%
13%
30
flagIndia
52%
36%
8%
4%
25
flagFrance
36%
18%
36%
9%
11