Countries bordered by only one other country:

• Lesotho – by South Africa
• San Marino – by Italy
• Vatican City – by Italy
• Qatar – by Saudi Arabia
• South Korea – by North Korea (across the demilitarized zone)
• Denmark – by Germany
• The Gambia – by Senegal
• Monaco – by France
• Brunei – by Malaysia
• Canada – by the United States
• Portugal – by Spain
• Dominican Republic – by Haiti
• Haiti – by Dominican Republic
• Brunei – by Malaysia
• Papua New Guinea – by Indonesia
• East Timor – by Indonesia
• Republic of Ireland – by the United Kingdom