There are 32 Commonwealth countries where the prime minister is the head of government ; the Commonwealth source also notes 7 additional countries where a prime minister exists but is not the head of government, bringing the total number of Commonwealth prime ministers to 39.

Quick note

If you meant all countries in the world , the exact number depends on how you define “prime minister only,” because some countries have a prime minister as head of government, some have a president instead, and some have both roles in different constitutional setups.

Clean takeaway

  • Commonwealth countries with a PM as head of government: 32.
  • Additional Commonwealth countries with a PM but not as head of government: 7.
  • Total Commonwealth countries with a prime minister in some form: 39.

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