The fourth season of Jane the Virgin originally aired in the United States on The CW from October 13, 2017, through April 20, 2018. The season was produced by CBS Television Studios, with Jennie Snyder Urman serving as showrunner. The series was renewed for a fourth season on January 8, 2017.

The third season of Jane the Virgin premiered on The CW on October 17, 2016 and ended on May 22, 2017. The season consisted of 20 episodes and stars Gina Rodriguez as Jane Villanueva a young Latina university student accidentally artificially inseminated with her boss' sperm, Rafael Solano. In this season, Jane marries Michael Cordero, Jr. and must deal with married life while Rafael discovers secrets from his past and his ex-wife, Petra Solano, deals with her evil twin sister.