Mu Sheng (沐晟; Mộc Thạnh; 1368–1439), courtesy name Jingmao (景茂), was a Chinese military general and politician during the Ming dynasty.

Mu Sheng was the second son of Mu Ying, the first Marquis of Xiping (西平侯). He was a solemn man of few words, and Hongwu Emperor very liked him. In 1399, his elder brother Mu Chun died without heir, so Mu Sheng succeeded him as Marquis of Xiping.

Mu was dispatched to attack Vietnam together with Zhang Fu in 1406. In the next year, they captured the Vietnamese usurper Hồ Quý Ly, and his son Hồ Hán Thương. The Vietnam was annexed by China again and renamed to Jiaozhi province (Giao Chỉ). For this accomplishment, he was elevated to the title "Duke of Qian" (黔国公).

In 1408, Trần Ngỗi, a Vietnamese prince, revolted against Ming China. Mu was dispatched to put down the rebellion, but was defeated. In the next year, Zhang Fu was sent to Vietnam again to support him. It proved that Mu was a general did not have military talents. Zhang captured Trần Ngỗi in 1410 successfully and came back to Nanjing, but Mu failed to put down the rebellion of the other prince, Trần Quý Khoáng, until Zhang Fu came to assist him again. They crushed the rebellion in 1414, and Mu was granted the title of Grand Tutor (太傅).

In 1426, he was sent to Vietnam again together with Liu Sheng to put down the rebellion of Lê Lợi, whom later became the founder of Lê dynasty. Later, Liu was killed by Vietnamese in Ải Chi Lăng, Mu had to retreat from Vietnam. Finally, Hongxi Emperor decided to abandon Jiaozhi Province, and Vietnamese gained independence again.

Mu Sheng took part in Luchuan–Pingmian campaigns together with Mu Ang (沐昂) and Fang Zheng (方政). Fang Zheng was defeated and killed in action, Mu Sheng had to retreat. He died in Chuxiong. He was elevated to the title "Prince Dingyuan" (定远王) and given the posthumous name Zhongjing (忠敬) posthumously. His eldest son Mu Bin (沐斌) succeeded as Duke of Qian.

沐晟（1368年 - 1439年），字景茂，明朝开国大将沐英次子，沐春弟、沐昂兄，安徽定远人，明朝军事人物。

沐晟早年继承长兄沐春「西平侯」爵位。永乐年间，同张辅进攻并占领安南，改其为交址，因攻进封「黔国公」。正统年间，率军讨伐麓川叛乱战败，退军后病逝。

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