Aptekarsky Ostrov Municipal Okrug (Russian: муниципа́льный о́круг Апте́карский О́стров) is a municipal okrug in Petrogradsky District, one of the eighty-one low-level municipal divisions of the federal city of St. Petersburg, Russia. As of the 2010 Census, its population was 20,575, up from 19,277 recorded during the 2002 Census.