The national anthem of Greece, which is based on Hymn to the Freedom by the poet Dionysios Solomos (1798-1857) is the longest in the world. It has 158 stanzas. However, if the criterion is music, rather than lyrics, then the longest national anthem is that of Uruguay. It is set to 105 bars of music.
Longest National Anthems: GREECE – lyrics – has a total of 158 verses! Though many songs have been written about the United Nations or on related themes, there is no official anthem or hymn for the Organization.