罗曼·斯坦尼斯瓦夫·德莫夫斯基（波兰语：Roman Stanisław Dmowski；1864年8月9日于华沙—1939年1月2日于波兰德罗兹多沃）是波兰政治家与民族民主政治集团（"Endecja"）的首席思想家和共同创建者。

德莫夫斯基开创的民族民主政治运动在50年的时间内一定程度地左右了波兰的历史与政治，并成为战间期波兰最强大的政治集团之一。德莫夫斯基虽然一生都是争议性人物，但在使波兰恢复独立的方面上还是起到了一定的作用。他与约瑟夫·毕苏斯基并称为波兰20世纪最重要的政治人物。

Roman Stanisław Dmowski [ˈrɔman staˈɲiswaf ˈdmɔfski] (9 August 1864 – 2 January 1939) was a Polish politician, statesman, and co-founder and chief ideologue of the right-wing National Democracy ("ND": in Polish, "Endecja") political movement. He saw the aggressive Germanization of Polish territories controlled by the German Empire as the major threat to Polish culture and therefore advocated a degree of accommodation with another power that had partitioned Poland, the Russian Empire. He favored the re-establishment of Polish independence by nonviolent means, and supported policies favorable to the Polish middle class. During World War I, in Paris, through his Polish National Committee he was a prominent spokesman, to the Allies, for Polish aspirations. He was a principal figure instrumental in the postwar restoration of Poland's independent existence.