Hapoli is a part of Ziro, the headquarters of Lower Subansiri district, Arunachal Pradesh, India where the administrative offices of the headquarters are located. The name is said to have been derived from "Hao-Polyang", by which name the Apatanis still know. Literally, "hao" means high or above and "polyang" means plain or plateau. It also serves as the commercial hub of Lower Subansiri district and boasts a large number of schools both government and private where students from all over the state come to study . The Apatanis are the native of this place and also forms the majority. It is divided into several zones, some of which are medical colony, Engineering Colony and SSB gate etc. The recent surge in the number of illegal immigrants from Bangladesh pose a huge threat to the tribal culture and the proper implementation of inner line permit system by the law enforcers can be seen as the only remedy as of now.