SBY is an abbreviation that can stand for:
- Susilo Bambang Yudhoyono, the 6th President of Indonesia
- IATA code for Salisbury-Ocean City Wicomico Regional Airport, Maryland, US
- Surabaya, East Java, Indonesia
- Selby railway station, North Yorkshire, England, National Rail station code
- Shibuya Station, JR East station code
- Stand-by (mode) of electronic device
- Space Battleship Yamato, a Japanese anime franchise