Blue flag

Blue flag or Blue Flag may refer to:

Sport and recreation

• Blue Flag beach, a beach or marina that meets certain quality standards
• Blue Flag, the flag of Chelsea F.C.
• Blue flag, a particular Flag#Swimming flags
• Blue flag, a particular Racing flags#Blue flag

Botany

• Larger Blue Flag or , a type of iris
• Slender Blue Flag or , a type of iris

Transport

• Blue flag, a particular Flag#Railway flags in railway use.
• Blue sign used by European waterways vessels passing on the starboard side

Military

• Blue Flag (Israeli Air Force exercise), the name of an Israeli Air Force exercise
• Blue Flag (United States Air Force exercise), the name of a United States Air Force command and control exercise

Other

• Blue Flag (manga), a manga series by KAITO.
• "The Blue Flag", World War I song composed by Carrie Jacobs-Bond
• Blue Flag, common representation of the street gang Crips

See also

• Bonnie Blue Flag