30th Army may refer to:

• 30th Army (People's Republic of China)
• 30th Army (Soviet Union)
• Thirtieth Army (Japan), a unit of the Imperial Japanese Army

• Brogan, Oregon
• Brogborough
• Brogden
• Brogden, Lancashire
• Brogden Middle School
• Brogger Glacier
• Broghammerus
• Broghammerus reticulatus
• Brogitarus
• Broglen River
• Brogliano
• Broglie, Auguste-Théodore-Paul de
• Brognaturo
• Brogne
• Brogny, Jean-Allarmet de
• Bro Goz ma Zadoù
• Brograve baronets
• Brograve Mill
• Bro Gwened
• Brogy (One Piece)
• Broharris Canal
• Brohers
• Brohisaurus
• Brohl
• Brohl-Lützing