Popilnia or Popilnya (Ukrainian: Попільня) is a rural settlement in Zhytomyr Raion, Zhytomyr Oblast, Ukraine.

It is the administrative center of Popilnia Raion.

Until 26 January 2024, Popilnia was designated urban-type settlement.

On this day, a new law entered into force which abolished this status, and Popilnia became a rural settlement.

[2] This article about a location in Zhytomyr Oblast is a stub.