Liu Songnian (刘松年 or traditional Liu Sung-nien, 1174–1224 CE), was a Chinese landscape painter during the early Southern Song Dynasty (1127–1279). He was active from about 1190-1230 and is considered one of the Four Masters of the Southern Song dynasty, which also included Li Tang, Ma Yuan and Xia Gui. He studied and worked at the Imperial Academy of Painting in Hangzhou, capital of the Southern Song dynasty.

Liu entered the Southern Song Imperial Academy of Painting as a student in 1189, and went on to become a painter-in-attendance from 1190 to 1194. During the reign of Emperor Ningzong of Song, he received a prestigious award for his work. Liu followed the tradition of Li Tang. Liu's style influenced the work of Ma Yuan and Xia Gui.

劉松年（？ - 約1225年後），時人呼之為暗門劉，南宋錢塘（今浙江杭州）人，居暗門（今杭州清波門）。

宋孝宗淳熙初畫院學生，宋光宗紹熙（1190—1194年）年間畫院待詔。師從張敦禮（張訓禮），工畫物、山水，筆墨精嚴、著色妍麗，多寫茂林修竹、山明水秀之景，所作屋宇界畫工整；兼畫人物神情生動、衣褶清勁。宋寧宗（1195—1224年）年間進「耕織圖」稱旨，賜金帶。

後人把他與李唐、馬遠、夏圭合稱為「南宋四家」。傳世作品有《羅漢》、《溪亭客話》、《四景山水》、《醉僧》、《天女獻花》等。