ATCC may refer to:

• American Type Culture Collection
• Asociación de Trabajadores Campesinos del Carare (Association of Peasant Workers of the Carare)
• Asian Touring Car Championship
• Air traffic control center
• Australian Touring Car Championship, the predecessor to the V8 Supercar Championship Series
• Ayutthaya Women's Volleyball Club A.T.C.C., Thailand

• Longyearbyen lokalstyre
• Longyearbyen School
• Longyear, John
• Longyear Lake
• Longyear River
• Longyear Valley
• Long Yellow Road (Toshiko Akiyoshi - Lew Tabackin Big Band album)
• Long Yintai
• Longyou Caves
• Longy School of Music
• Longyuan Electric Power Group
• Longyuan Rudong Intertidal Wind Farm
• Longzha, Yanling
• Longzhou (disambiguation)
• Longzhou, Hebei
• Longzhou, Xingtang County
• Longzhou Zhuang language
• Longzhua
• Longzhua loculata
• Long Đức Industrial Park
• Long–Allen Bridge (disambiguation)
• Long–Allen Bridge (Shreveport)
• Long–Evans rat
• Lon Haldeman
• Lon Helton