List of countries by system of government

This is a list of sovereign states by system of government. There is also a political mapping of the world that shows what form of government each country has, as well as a brief description of what each form of government entails. The list is colour-coded according to the type of government, for example: blue represents a republic with an executive head of state, and red is a constitutional monarchy with a ceremonial head of state. The colour-coding also appears on the following map, representing the same government categories. The legend of what the different colours represent is found just below the map.

Certain states have been defined as having more than one system of government or a hybrid system – for instance, Poland possesses a semi-presidential government where the president appoints the prime minister or can veto legislation passed by parliament, but its Constitution defines the country as a parliamentary republic and its ministry is subject to parliamentary confidence.