The sixth season of the American comedy-drama television series Orange Is the New Black premiered on Netflix on July 27, 2018, at 12:00 am PDT in multiple countries. It consists of thirteen episodes, each between 50–84 minutes. The series is based on Piper Kerman's memoir, Orange Is the New Black: My Year in a Women's Prison (2010), about her experiences at FCI Danbury, a minimum-security federal prison. The series is created and adapted for television by Jenji Kohan.

This season takes place in a maximum security prison, after the inmates incite a riot at Litchfield Penitentiary during the previous season, and the season deals with the fallout from the riot. The main story arc of the season involves a gang-like war between two cell blocks which is sparked by the feud between two sisters. Meanwhile, the guards play a fantasy sport game called "fantasy inmate". Several supporting characters who appeared throughout the first five seasons are absent in this season due to change in setting, but this season introduces several new characters featured in maximum security.