- ACY stands for Advocates for Children and Youth (Maryland)
- ACY stands for Atlantic City Rail Terminal (Amtrak station code; Atlantic City, NJ)
- ACY stands for Akron, Canton and Youngstown (railroad; 1907-1982; Ohio)
- ACY stands for Assets for Colorado Youth (Denver, CO)
- ACY stands for Atlantic City /Atlantic Cty, NJ, USA – Atlantic City International (Airport Code)
- ACY stands for American Corner Yaffo
- ACY stands for Advancing Communities for Youth (Partnership for After School Education; New York, NY)
ACY