YSB or YSb may refer to:

• Yonsei School of Business
• Sudbury Airport
• Yacht Safety Bureau
• Yokohama Specie Bank
• Yttrium(III) antimonide

• 29979 Wastyk
• 29982 Sarahwu
• 29983 Amyxu
• 29984 Zefferer
• 29987 Lazhang
• 29988 Davidezilli
• 29991 Dazimmerman
• 29992 Yasminezubi
• 29994 Zuoyu
• 29995 Arshavsky
• 299 AD
• 299 CE
• 299P/Catalina-PANSTARRS
• 299P/Catalina–PANSTARRS
• 299th Infantry Regiment (United States)
• 299th Rifle Division
• 299th Rifle Division (Soviet Union)
• 299 (year)
• 29 Bahman Metro Station (Tabriz)
• 29 (BATUS) Flight AAC
• 29 BC in Japan
• 29 CE
• 29 Cephei
• 29 Commando Regiment, Royal Artillery
• 29 December 1940