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
flagGermany
92%
7%
0%
0%
13
flagCanada
81%
0%
0%
9%
11
flagthe United States
73%
19%
4%
2%
42
flagPoland
62%
18%
8%
10%
1549