Blue Army
Blue Army may refer to:
- Blue Army (Poland), the Polish army unit
 - Blue Army (Russia), the armed peasant group
 - 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