Józef Mianowski (1804–1879) was a Polish medical researcher and practitioner, academic, social and political activist, and rector of the "Main School" incarnation (1862–69) of Warsaw University.
In honor of Mianowski, after his death, in 1881, a foundation was inaugurated to support scientific and scholarly research, named Kasa imienia Józefa Mianowskiego — "the Józef Mianowski Fund" or, more simply, "the Mianowski Fund."
In his youth, Mianowski graduated from Wilno University. He served as a clinical assistant to Jędrzej Śniadecki, was a friend of Polish Romantic poet Juliusz Słowacki, and in 1831 married (his wife died only a year later, in childbirth).
A rising star in medicine, in 1838 Mianowski became an assistant professor at the Wilno Medical-Surgical Academy (a school detached from Wilno University, which had been closed in the aftermath of the November 1830 Uprising. A lecturer in animal and human physiology and general therapeutics in 1839–42, he thrice received a prestigious "diamond ring" from the Russian Tsar.
In 1840, as physician to Polish independence activist Szymon Konarski, Mianowski was arrested and harshly interrogated, but half a year later he was declared innocent and rehabilitated. He accepted a position at the Saint Petersburg Medical-Surgical Academy, where he oversaw the gynecology and pediatrics wards. He worked at the Academy from 1842 to 1860. In 1848 he was appointed personal physician to the Tsar's daughter, Grand Duchess Maria Nikolaievna, Duchess of Leuchtenberg. He was also chief physician at the Second Hospital of Land Forces. In 1860 he retired, but remained physician to the Grand Duchess and had extensive contacts at the Russian Imperial court.