UNB may refer to:
Education National University of Benin (French: ) University of Brasília University of New Brunswick University of New Brunswick Fredericton campus (UNBF) University of New Brunswick Saint John campus (UNBSJ)
Sports University of New Brunswick UNB Reds UNB Saint John Seawolves
Other Barrientista National Union (Spanish: ), a political party in Bolivia Unnilbium (Unb), a chemical element now known as Nobelium Union National Bank a bank in the United Arab Emirates United News of Bangladesh Ultra Narrow Band, a network technology UNB (group), a South Korean boy band consisting of winners from The Unit: Idol Rebooting Project