Kishiryu Sentai Ryusoulger (騎士竜戦隊リュウソウジャー, Kishiryū Sentai Ryūsōjā, Knightosaur Squadron Ryusoulger) is a Japanese tokusatsu drama and the 43rd entry of the Toei Company's long-running Super Sentai series, succeeding Kaitou Sentai Lupinranger VS Keisatsu Sentai Patranger and following the four week special TV miniseries Super Sentai Strongest Battle. Although the series primarily aired in the Reiwa era, it is considered the final Heisei era series as it began airing during it. It is the fourth Super Sentai series to utilize the motif of dinosaurs, having been preceded by Zyuden Sentai Kyoryuger (and Zyuden Sentai Kyoryuger Brave), as well as the first to utilize the motif of knights.

The show aired from March 17, 2019, to March 1, 2020, joining Kamen Rider Zi-O, later Kamen Rider Zero-One, in the Super Hero Time line-up on TV Asahi affiliate stations. Additionally, Ryusoulger began airing in South Korea in August 2019 as Power Rangers Dino Soul and its footage was adapted for Power Rangers Dino Fury.