The BAe 125-800 / Hawker 800 is a series of twin-engined corporate jet aircraft for max. 15 passengers produced by the British manufacturer BAe, British Aerospace and later by the US-American manufacturer Raytheon, later Hawker Beechcraft. The BAe 125-800 series include the BAe 125-800 / Hawker 800 (BAe.125 Series 800A & Series 800B), the Hawker Beechcraft Hawker 800XP, Hawker 850XP, Hawker 900XP and the Hawker 750. The Hawker U-125A is a search and rescue (SAR) variant for the Japan Air Self Defense Force.

The BAe 125-800 is a development of the earlier Hawker Siddeley HS.125 (British Aerospace BAe 125) and is the successor of the BAe 125-700. The BAe 125-800 / Hawker 800 differs from the BAe 125-700 in the following major respects: new Garrett/AlliedSignal TFE 731-5R engines, increased wing span, new avionics including EFIS (Electronic Flight Instrument System), higher certified weights and a higher speed. The Hawker 800XP is equipped with more powerful AlliedSignal TFE 731-5BR engines. The Hawker 850XP differs from the Hawker 800XP by addition of winglets on the outboard wings. The Hawker 900XP is equipped with Honeywell TFE731-50R engines and new avionics equipment and offers a longer range. The Hawker 750 differs from the Hawker 800XP by having an external baggage unit in place of the aft ventral fuel tank. The range and MTOW is less than that of the Hawker 800XP as a result of the decrease in available fuel. Last production models were the Hawker 750 and the Hawker 900XP.