The following is a list of sovereign countries whose names end with the letter ‘O’.
- Burkina Faso
- Democratic Republic of the Congo
- Lesotho
- Mexico
- Monaco
- Montenegro
- Morocco
- Republic of the Congo
- San Marino
- Togo
- Trinidad and Tobago
Other
- Republic of Kosovo (Not recognized by all UN Member states)
- Curacao (constituent country within the Kingdom of the Netherlands)
- Puerto Rico (unincorporated territory of the United States)
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