Mirjaqyp Dulatuly (Kazakh: Міржақып Дулатұлы, Mırjaqyp Dulatūly; Russian: Миржакып Дулатов, also known as Mir Yakub Dulatov, was a Kazakh poet, writer and one of leaders of Kazakh nationalist Alash Orda government. He also is known to have used the pen names Madiyar and Arghyn.

Alash was a political party and liberation movement in the Russian Republic and Soviet Russia, and the ruling party of Alash Autonomy on the territory of present-day Kazakhstan and Russia. They advocated for equal treatment between Kazakhs and Russians and the cessation of Russian settlement on the Kazakh lands. It was notably the first modern organized political Kazakh and Kyrgyz elite group.