超音速客机（英语：Supersonic Transport，SST）是指能够实现以超过音速飞行的民航飞机，历史至今仅有两种超音速客机曾经批量生产并投入商业营运，分别为英国、法国联合研制的协和飞机，以及苏联的Tu-144，均在1960年代末出现。但超音速客机自问世以来一直备受成本效益、环境破坏等因素困扰，并未有大规模推广使用。图-144在1978年6月进行最后一次载客飞行后离开商业营运的舞台，而协和飞机在2003年11月26日进行最后一次的商业飞行。随着协和飞机的正式退役，自此世界上再没有提供商业营运的超音速客机。

A supersonic transport (SST) is a civilian supersonic aircraft designed to transport passengers at speeds greater than the speed of sound. To date, the only SSTs to see regular service have been Concorde and the Tupolev Tu-144. The last passenger flight for the Tu-144 was in June 1978 and it was last flown in 1999 by NASA. Concorde's last commercial flight was in October 2003, with a November 26, 2003 ferry flight being its last airborne operation. Following the permanent cessation of flying by Concorde, there are no remaining SSTs in commercial service.