A23

A23 may refer to:
 * A-23 Baltimore, an early light reconnaissance bomber
 * A23 battery
 * Aero A.23, a Czech passenger plane of the 1920s
 * Arrows A23, a Formula One car
 * British NVC community A23 (Isoetes lacustris/setacea community), a plant community
 * HLA-A23, an HLA-A serotype
 * Samsung Galaxy A23, an Android smartphone
 * A23a, a large iceberg which calved in 1986

Roads

 * List of A23 roads