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