Hesarak or Hisarak may refer to:
Hesarak is a large suburb of Karaj in Iran.
It is connected via Metro to Greater Tehran. It is close to where Morvarid Palace is located. Tarbiat'e Moallem University is located in Hesarak
Hesarak is surrounded by Alborz mountains from north, Tehran-Qazvin highroad from south, Kharazmi University from west and Razi Vaccine and Serum Research Institute from east, so they call this suburb "Hesarak" (which means Small Hesar = Small fence in Persian).
Razi Vaccine and Serum Research Institute is located here.