The sixth season of Chicago P.D., an American police drama television series with executive producer Dick Wolf, and producers Derek Haas, Michael Brandt, and Rick Eid, was ordered on May 9, 2018. The season premiered on September 26, 2018. The season concluded on May 22, 2019, and contained 22 episodes. This is the last season where Jon Seda plays Antonio Dawson.

The fifth season of Chicago P.D., an American police drama television series by executive producer Dick Wolf, premiered on September 27, 2017, and concluded on May 9, 2018. It contains 22 episodes, including the series' 100th. It is the final season featuring Elias Koteas as Alvin Olinsky.