The 2017 No Mercy was the 13th No Mercy professional wrestling pay-per-view (PPV) and livestreaming event produced by WWE. It was held exclusively for wrestlers from the promotion's Raw brand division. The event took place on September 24, 2017, at Staples Center in Los Angeles, California. No Mercy was discontinued after the 2017 event as following WrestleMania 34 in 2018, WWE discontinued brand-exclusive PPVs, resulting in the reduction of yearly PPVs produced. In 2023, however, No Mercy was revived for WWE's developmental brand, NXT.

Eight matches were contested at the event, including one on the Kickoff pre-show. In the main event, Brock Lesnar defeated Braun Strowman to retain the Universal Championship. In another marquee match, Roman Reigns defeated John Cena. In other prominent matches, Dean Ambrose and Seth Rollins defeated Cesaro and Sheamus to retain the Raw Tag Team Championship and Alexa Bliss defeated Bayley, Emma, Nia Jax, and Sasha Banks in a fatal five-way match to retain the Raw Women's Championship.