The Imperial Lyceum (Russian: Императорский Царскосельский лицей, romanized: Imperatorskiy Tsarskosel'skiy litsey) in Tsarskoye Selo near Saint Petersburg, also known historically as the Imperial Alexander Lyceum after its founder Tsar Alexander I, was an educational institution which was founded in 1811 with the object of educating youths of the best families who would afterwards occupy important posts in the Imperial service.

Its regulations were published on 11 January 1811, but they had received the Imperial sanction on 12 August 1810, when the four-story "new" wing of the Great Palace was appointed for its accommodation.

In May 1918, the Lyceum was closed following order by the Council of People's Commissars.

[1] During the 33 years of the Tsarskoye Selo Lyceum's existence, there were 286 graduates.

The most famous of these, in addition to the above two, were Anton Delvig, Wilhelm Kuchelbecker, Nicholas de Giers, Dmitry Tolstoy, Yakov Grot, Nikolay Danilevsky, Aleksey Lobanov-Rostovsky, Fyodor Shcherbatskoy and Mikhail Saltykov-Shchedrin.