Decca may refer to:

• Decca Records or Decca Music Group, record label
• Decca Gold, classical music record label owned by Universal Music Group
• Decca Broadway, musical theater record label
• Decca Studios, recording facility in West Hampstead, England
• London Decca, maker of turntable tonearms and cartridges
• Decca tree, microphone recording system
• The Deccas, guitar-based band from Medway, England

• Decca Aitkenhead, English journalist, writer and broadcaster.

• Grace Decca (born 1966), Cameroonian singer and producer
• Marie Decca (1859-?), American opera singer
• Mpundi Decca, Congolese guitarist

• Decca: The Letters of Jessica Mitford, 2006 book by Jessica Mitford
• Decca Navigator System, defunct marine and aeronautical navigation system
• Decca Radar, later Racal-Decca Marine, a defunct marine electronics manufacturer
• Decca Sports Ground, cricket ground in London, England
• Decca, old spelling of Dhaka, capital of Bangladesh
• Ladda decca, species of butterfly in the family Hesperiidae

• Deca (disambiguation)
• Deccan (disambiguation), terms related to the Deccan Plateau in southern India