Countries bordering only one other country
Country
Neighbour
Border length (km)
Notes
Brunei
Malaysia
381
Borders the Malaysian state of
Sarawak on the island of
Borneo.
Canada
United States
8,893
The border around the area of
Hans Island between Canada and Greenland (a Danish dependent territory) is disputed and undefined. Canada also shares a maritime border with
Saint Pierre and Miquelon, a French dependent territory
Denmark
Germany
68
Denmark is connected to
Sweden via the
Øresund Bridge. The border around the area of
Hans Island between Canada and Greenland (a Danish dependent territory) is disputed and undefined. See dependent territories below.
Dominican Republic
Haiti
360
On the island of
Hispaniola.
Gambia
Senegal
740
Haiti
Dominican Republic
360
On the island of
Hispaniola.
Ireland
United Kingdom
360
The Republic of Ireland borders the
United Kingdom on the island of
Ireland.
Lesotho
South Africa
909
Lesotho is an
enclave entirely surrounded by South Africa.
Monaco
France
4.4
Monaco is surrounded on three sides by France, the last bordering the
Mediterranean.
Papua New Guinea
Indonesia
820
On the island of
New Guinea.
Portugal
Spain
1,214
Qatar
Saudi Arabia
60
The planned
Qatar–Bahrain Friendship Bridge would connect Qatar to
Bahrain.
San Marino
Italy
39
San Marino is an
enclave entirely surrounded by Italy.
South Korea
North Korea
238
On the
Korean Peninsula, at the
Demarcation Line. The two countries are separated by a 4 km wide
Demilitarized Zone.
Timor-Leste
Indonesia
228
On the island of
Timor.
United Kingdom
Ireland
360
The United Kingdom borders the
Republic of Ireland on the island of
Ireland. The UK is also connected to
France via the
Channel Tunnel. The UK sovereign base areas
Akrotiri and Dhekelia share borders with
Cyprus.
Gibraltar, a UK overseas territory, shares a border with
Spain. See dependent territories below.
Vatican City
Italy
3.2
The Vatican is an
enclave entirely surrounded by Italy.
