| Yurii Mitropolskyi | |
| Birth Date: | 3 January 1917 |
| Birth Place: | Shishaki, Mirgorodsky Uyezd, Poltava Governorate, Russian Empire |
| Death Place: | Kyiv, Ukraine |
| Field: | mathematics, dynamical systems, differential equations |
| Awards: | Hero of Ukraine, State Prize of Ukraine in Science and Technology, Lenin Prize, Hero of Socialist Labour |
| Work Institution: | Institute of Mathematics of NAS of Ukraine |
| Doctoral Advisor: | Nikolay Bogolyubov |
| Doctoral Students: | Oleksandr Sharkovsky |
| Alma Mater: | Taras Shevchenko National University of Kyiv |
Yurii Oleksiiovych Mitropolskyi (Ukrainian: Юрій Олексійович Митропольський; 3 January 1917 – 14 June 2008) was a renowned Soviet and Ukrainian mathematician known for his contributions to the fields of dynamical systems and nonlinear oscillations. He was born in Poltava Governorate and died in Kyiv.
He received his Ph.D. from Kyiv University, under the supervision of theoretical physicist and mathematician Nikolay Bogolyubov. Mitropolskyi is one of the most frequently joint-published mathematicians known, with at least 240 collaborators. Member of the Communist Party since 1945.