The Liberal Party was a major political party in Greece during the early-to-mid 20th century. It was founded in August 1910 by Eleftherios Venizelos and went on to dominate Greek politics for a considerable number of years until its decline following the Second World War. Among its most well-known members, apart from Venizelos, were Alexandros Papanastasiou, Nikolaos Plastiras, Georgios Papandreou and Konstantinos Mitsotakis.

Eleftherios Kyriakou Venizelos was a Cretan Greek statesman and prominent leader of the Greek national liberation movement. He is noted for his contribution to the expansion of Greece and promotion of liberal-democratic policies. As leader of the Liberal Party, he held office as prime minister of Greece for over 12 years, spanning eight terms between 1910 and 1933. During his governance, Venizelos entered in diplomatic cooperation with the Great Powers and had profound influence on the internal and external affairs of Greece. He has therefore been labelled as "The Maker of Modern Greece" and is still widely known as the "Ethnarch".