How many countries have a prime minister and how many countries have a president?

As of October 2023, approximately 60 countries have a prime minister as the head of government, often within parliamentary systems. In contrast, around 150 countries have a president, which can serve as either the head of state, the head of government, or both, depending on the country's political structure. The exact numbers can vary slightly depending on political changes and the definitions used for these roles.