Constantine Ypsilanti (Romanian: Constantin Ipsilanti, d. 1816), was the son of Alexander Ypsilanti.
He had joined in a conspiracy to liberate Greece and, on its discovery, fled to Vienna, had been pardoned by the sultan and in 1799 appointed by him hospodar of Moldavia. Deposed in 1805, he escaped to St Petersburg, and in 1896, at the head of some 20,000 Russians, returned to Bucharest, where he set to work on a fresh attempt to liberate Greece.
Some Greek princes formed a glorious exception, and, by introducing reforms in favour of the peasants, rendered great services to both countries; especially notable in this respect were Nicholas and Constantine Mavrocordatus in Wallachia and Gregory Ghica in Moldavia.
When Vaivode AlexanderYpsilanti, a Fanariot, utilized the princely office to promote the rebellion of the Greeks against the Turkish rule, the Porte found itself compelled to cease appointing Greeks to the princely dignity, and to revert to the old practice of naming Rumanians.
Russia now began to interest itself in the principalities, though only for interested reasons; by the Treaty of Akerman it obtained that only boyars should be appointed princes.