Hainggyikyun Subtownship is a subtownship of Ngapudaw Township in Pathein District, Ayeyarwady Region, Myanmar. The namesake of the subtownship is Hainggyikyun, a town of 14,771 people. The subtownship is coastal, bordering the Andaman Sea to its south and the Bay of Bengal to the west. To its north, it borders the rest of Ngapudaw Township and to its east it borders Labutta Township. Cape Negrais, the southern end of the Arakan Mountains is located within the township.