Abolished monarchies

The first well-known abolition of a modern law-based monarchy occurred in when Oliver Cromwell successfully led a rebellion that briefly overthrew the English and Scottish monarchies, with the execution of King Charles I in 1649. The most famous monarchical abolition occurred in 1792 when the French monarchy was abolished during the French Revolution.

The monarchy in the Thirteen Colonies that became the United States of America were abolished in 1776 when they unilaterally declared their independence from Great Britain.

The monarchies of Russia, Turkey, Germany, Hungary and Austria were abolished in the aftermath of World War I. Those of Romania, Albania, and Italy were abolished in the aftermath of World War II.

In the end of World War I, monarchies were planned for the Grand Duchy of Finland (Väinö I of Finland), and for Lithuania (Mindove II of Lithuania[?]), with a protectorate-like dependency of Germany. Both kings denounced their thrones after Germany's defeat in November 1918.

The monarchies of India, Kenya, Tanzania, South Africa, Zambia, and Zimbabwe were abolished when or shortly after they became independent of the United Kingdom, while remaining within the commonwealth in the middle of the 20th century. That of Ireland was not abolished when Ireland became independent of Britain in the 1920s, but was abolished by the Republic of Ireland Act of 1948, which came into force in 1949.

That of Egypt was abolished by a coup d'etat in 1952. that of Iran was abolished by a Islamic coup d'etat in 1979.

The voters of Australia overwhelmingly rejected a proposal to abolish their monarchy in 1999 (rejected in all states, with only the Australian Capital Territory passing the referendum). Brazil rejected an attempt to restore its monarchy in the 1990s, while efforts to restore the monarchies of some of the Balkan states in the former Eastern Bloc continue. In Bulgaria Simeon Saxe-Coburg Gotha, who was deposed from the Bulgarian throne in 1946, has been elected and currently serves as the Prime Minister of his country.

Monarchies Abolished in the 20th century

• Portugal, 1910 (coup d'etat)
• Korea, 1910
• China, 1911 (coup d'etat)
• Greece, 1916 (restored 1936, abolished again in 1973 and 1974)
• Russia, 1917 (coup d'etat)
• Germany, 1918
• Austria, 1918
• (Finland, 1918 - never in effect)
• (Lithuania, 1918 - never in effect)
• Turkey, 1922 (coup d'etat)
• Greece, 1924
• Yugoslavia, 1941
• Italy, 1946 (referendum)
• Bulgaria, 1946
• Albania, 1947
• Romania, 1947
• Egypt, 1952 (coup d'etat)
• Vietnam, 1955
• Tunisia, 1957
• Iraq, 1958 (coup d'etat)
• Yemen 1962
• Burundi, 1966
• Libya, 1969 (coup d'etat)
• Greece, 1973 (referendum)
• Afghanistan, 1973 (coup d'etat)
• Ethiopia, 1974 (coup d'etat)
• Laos, 1975 (coup d'etat)
• Iran, 1979 (coup d'etat)
• Mauritius, 1992
• Fiji, 1998 (coup d'etat)

Monarchies that were Abolished then restored

• Spain, deposed 1931, restored 1975
• Grenada, briefly deposed then restored in 1983
• Cambodia, deposed 1960, restored 1993

See also: List of monarchs deposed in the 20th century