TCG may stand for:

• Geocentric Coordinate Time (Temps-coordonnée géocentrique)
• Test call generator, in telecommunications
• TCG (album), a 2007 album from The Cheetah Girls
• Teleport Communications Group, later acquired by AT&T
• Theatre Communications Group
• Trading card game
• Trusted Computing Group, formed by AMD, Hewlett-Packard, IBM, Intel, and Microsoft
• Türkiye Cumhuriyeti Gemisi, ship prefix for Ship of the Turkish Republic
• The genetic code for Serine according to the DNA codon table
• Tongan Crip Gang, a street gang
• IATA code for Tacheng Airport, China
• Tiny Code Generator, interpreter/translator engine of QEMU
• Tunisian Combat Group
• Taipei City Government

• A. Baha Balantekin
• Abaham lincoln
• Abahani Krira Chakra
• Abahani Limited
• Abahani Limited (Chittagong)
• Abahani Limited Dhaka
• Abahani Limited (disambiguation)
• Abahb
• ABA Heavyweight Champion
• Abahlali baseMjondolo (membership & structures)
• Abahoman
• ABAI
• Abaiang Airport
• Abaiang Atoll Airport
• Abai (disambiguation)
• Abaidullah
• Aba II
• Abai Kazakh National Pedagogical University
• Abaios
• ABAIR
• Abaira
• Abai (river)
• Abai River
• Aba Island
• ABA J.