Hainggyi Island (, also spelt Haigyi Island or Hainggyikyun) is a town on Hainggyi Island located at the mouth of the Pathein River (formerly Bassein River) in the Ayeyarwady Region of south-west Myanmar. It is the primary town within Hainggyikyun Subtownship within Ngapudaw Township in the Pathein District.
The town has an area of .
The Pammawaddy Regional Command of the Myanmar Navy is headquartered in Hainggyi Island. The naval base used to host a few PLA personnel from China. According to Andrew Selth, claims of a massive PLA base on Hainggyi Island are plainly incorrect and gained popularity because of hysterical quotations by commentators.