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" (黔國公).

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" (定遠王) 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，明朝開國大將沐英次子，沐春弟、沐昂兄，安徽定遠人，明朝軍事人物。

沐晟早年繼承長兄沐春「西平侯」爵位。永樂年間，同張輔進攻並佔領安南，改其為交阯，因攻進封「黔國公」。正統年間，率軍討伐麓川叛亂戰敗，退軍後病逝。

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