Petrogradsky Island is the third largest island in the Neva River delta in Saint Petersburg, Russia. Along with Zayachy Island, Aptekarsky Island, and Petrovsky Island, it constitutes the Petrogradskaya Side (Russian: Петроградская сторона). It is the administrative center of the Petrogradsky District and hosts a number of universities and research centers, as well as cultural, historical, and recreational facilities.