This is a list of sovereign states in the 1920s, giving an overview of states around the world during the period between 1 January 1920 and 31 December 1929.
It contains entries, arranged alphabetically, with information on the status and recognition of their sovereignty.
It includes 90 widely recognized sovereign states, and entities which were de facto sovereign but which were not widely recognized by other states.
Australia administered two League of Nations mandates: Belgium administered one League of Nations mandate: Capital: Beijing, Nanjing France administered the following League of Nations mandates: Capital: Mecca (Hejaz), Riyadh (Nejd) Japan administered one League of Nations mandate: New Zealand administered one League of Nations mandate: Capital: Cape Town, Pretoria, Bloemfontein, and Pietermaritzburg United Kingdom administered the following League of Nations mandates: Excluded from the list above are the following noteworthy entities which either were not fully sovereign or did not claim to be independent: