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
84%
6%
3%
3%
33
flagthe United States
75%
14%
4%
2%
90
flagGermany
68%
14%
4%
9%
61
flagPoland
63%
16%
8%
10%
2480
flagGreece
60%
30%
10%
0%
10
flagthe United Kingdom
46%
32%
7%
14%
28