The Head of Government is the government official who is the political leader of a nation. Some heads of government double as head of state. Notable heads of government in the modern era include the posts of President of the United Federation of Planets (Nanietta Bacco), Chancellor of the High Council of the Klingon Empire (Martok, Son of Urthog), Praetor of the Romulan Star Empire (Tal'Aura), Grand Nagus of the Ferengi Alliance (Rom), Autarch of the Tzenkethi Coalition, and Castellan of the Cardassian Union (Alon Ghemor). Within the Federation's political subdivisions, heads of government include the posts of Prime Minister of United Earth, President of the United States of America (subdivision of United Earth), Chancellor of the Andorian Empire, President of the Trill Union, and First Minister of the Republic of Bajor.

Heads of Government
Interstellar States	Federation President • Klingon Chancellor • Romulan Praetor • Imperial Romulan State Empress • Cardassian Castellan • Cardassian Chief Executor • Ferengi Grand Nagus • Tzenkethi Autarch • Gorn Imperator • Breen Domo • Orion Chancellor • Tholian Ruling Conclave • Thallonian Prime Minister • Tezwan Prime Minister • Enoch President • Kropasar High Cyning • Caeliar Tanwa-Seynorral • Talarian Commander-in-Chief • Knshaya Pontifex
Federation Member States	United Earth Prime Minister • Vulcan Administrator • Vulcan First Minister • Andorian Chancellor • Alpha Centauri Governor • Bajoran First Minister • Trill President • Cestus Governor • Betazoid Governor • Denevan President • Pacifican Governor • Peliar Zel Governor • Zaldan Leader
Federation Colonies	Tarsus Governor • Alpha V Governor • Mantilles Governor • Caldos Governor
UFP Member State Polities	United States President (United Earth) • Indian Prime Minister (United Earth) • Governor of Prophet's Landing (Republic of Bajor)
Mirror Universe	Terran Emperor • Terran Consul • Klingon Regent