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%
5%
1%
126
flagthe Netherlands
76%
7%
7%
7%
13
flagCanada
75%
11%
4%
4%
81
flagGermany
69%
14%
4%
10%
207
flagPoland
65%
14%
8%
9%
3528
flagGreece
63%
27%
9%
0%
11
flagAustralia
56%
37%
6%
0%
16
flagthe United Kingdom
55%
23%
7%
11%
63
flagIndia
52%
33%
9%
4%
21
flagSwitzerland
50%
16%
5%
22%
18
flagAustria
48%
36%
0%
16%
25
flagFrance
36%
18%
36%
9%
11