Blue Army may refer to:
Blue Army (Poland), the Polish army unit Blue Army (Russia), a term for some armed peasant groups in the Tambov Rebellion during the Russian Civil War, more typically considered part of the 'green armies' Blue Army of Our Lady of Fátima, the Catholic lay organization Blue Army (Aerosmith), Aerosmith fans Ipswich Town F.C., nickname for Ipswich Town football club fans Leicester City F.C., nickname for the football club Portsmouth F.C. chant used in games
See also Black Army (disambiguation)