Blue Danube may refer to:

• "The Blue Danube", a waltz composed by Johann Strauss II
• The Blue Danube (1926 film), a German silent film directed by Frederic Zelnik
• The Blue Danube (1928 film), an American silent film starring Leatrice Joy
• The Blue Danube (1932 film), a British film
• The Blue Danube (1939 film). an American cartoon film by Hugh Harman
• The Blue Danube (1940 film), an American drama film
• The Blue Danube (1955 film), an Austrian film
• Blue Danube (nuclear weapon), the first British operational nuclear weapon
• Blue Danube (band), an Austrian band who represented their country in the 1980 Eurovision Song Contest
• Blue Danube Radio, an English-language radio station in Vienna
• Blue Danube, or Blue Onion, a porcelain pattern
• Blue Danube (album)