XBB

XBB may refer to:


 * SARS-CoV-2 Omicron variant § XBB, a subvariant of the virus that causes COVID-19
 * The aboriginal Lower Burdekin languages of Australia
 * The European Monetary Unit used in bond markets
 * Blubber Bay Seaplane Base, British Columbia, Canada – see List of airports by IATA airport code: X