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%
125
flagthe Netherlands
76%
7%
7%
7%
13
flagCanada
75%
11%
5%
5%
76
flagGermany
69%
13%
5%
10%
190
flagPoland
65%
15%
8%
9%
3447
flagGreece
63%
27%
9%
0%
11
flagAustralia
56%
37%
6%
0%
16
flagthe United Kingdom
55%
22%
8%
11%
61
flagIndia
52%
31%
10%
5%
19
flagSwitzerland
52%
17%
5%
17%
17
flagAustria
45%
37%
0%
16%
24
flagFrance
30%
20%
40%
10%
10