BN or bn may stand for:

• Barisan Nasional, a political party in Malaysia
• Barnes and Noble, a popular bookstore/coffeeshop
• Bengali language (ISO 639 alpha-2, bn)
• Boron nitride (BN)
• Brunei (ISO country code) or its Internet top-level domain (.bn)
• Burlington Northern Railroad
• Brand New, an American emo/nu punk rock band