The twentieth season of the American animated sitcom South Park premiered on Comedy Central on September 14, 2016, and ended on December 7, 2016, containing ten episodes.

This season featured recurring themes focusing on Internet trolls, nostalgia, and the 2016 United States presidential election.

[2] To promote the season, Comedy Central had mobile billboards placed in key locations in seven cities around the United States.

Comedy Central's Chief Marketing Officer Walter Levitt stated, "That was all expected, and we completely understand why.

Though the finale failed to properly tie everything together, South Park's ability to adapt and course-correct to real-world developments served it well this year.