满洲龙属（学名：Mandschurosaurus）又名满州龙，是鸭嘴龙科的一属恐龙，化石是从中国满洲的上白垩纪地层发现的。模式种是阿穆尔满洲龙（M. amurensis，又名黑龙江满洲龙），化石是一副保存较差的不完整骨骼，由俄罗斯科学家于1914年在黑龙江的河岸挖掘出土。牠是第一个在中国发现的恐龙，并在圣彼得堡的中央地质勘探博物馆中展示，不过大部份的部件是由石膏构成。

满洲龙明显是很大型的鸭嘴龙科，至少有6-8公尺长。正模标本最初曾被认为是糙齿龙，后来在1930年被创建为新属，满洲龙属。满洲龙的有效性曾有一些争议：在1979年，Brett-Surman认为牠是疑名。后来的学者则主张牠们是有效属。在2004年，杰克·霍纳（Jack Horner）将模式种归类为疑名。

Mandschurosaurus is a genus of hadrosaurs based on material from the Upper Cretaceous of Belye Kruchi, Manchuria. M. amurensis is based on a poorly preserved and incomplete skeleton collected by Russian scientists in 1914 from the banks of the Amur River. It was the first dinosaur genus named from China, and a mounted skeleton is on display at the Central Geological and Prospecting Museum in St. Petersburg. However, much of the skeleton is plaster. Regardless, the remains represent a large hadrosaurid. There has been some debate regarding the validity of this genus. Brett-Surman (1979) first considered it a nomen dubium, though some later workers have continued to see it as a valid taxon (Chapman et Brett Surman, 1990, for example). Most recently, Horner et al. (2004) listed the type species as a nomen dubium. The holotype material was initially referred to the genus "Trachodon" (also a nomen dubium), but later reassigned to a new genus by Riabinin (1930).