There are many countries that share a border with only one other country. Some of these include:
- Brunei borders Malaysia.
- The Dominican Republic borders Haiti.
- Gambia borders Senegal.
- Haiti borders The Dominican Republic.
- Ireland borders Northern Ireland (part of the United Kingdom).
- Lesotho borders South Africa.
- Monaco borders France.
- Papua New Guinea borders Indonesia.
- Portugal borders Spain.
- Qatar borders Saudi Arabia.
- San Marino borders Italy.
- South Korea borders North Korea.
- Timor-Leste borders Indonesia.
- Vatican City borders Italy.
