Yusif Haydar oglu Mammadaliyev (Azerbaijani: Yusif Heydər oğlu Məmmədəliyev;December 31, 1905-December 15, 1961) was an Azerbaijani chemist. He was a Doctor of Chemistry, academician of the National Academy of Sciences of the Azerbaijan SSR, and was the president of the National Academy of Sciences of the Azerbaijan SSR.