Yūki Okada is a Japanese actor and voice actor born on October 8, 1987, in Tokyo, Japan. He is affiliated with the talent agency Atomic Monkey. Okada began his career as an actor while still in high school during the 2000s, appearing in television dramas, variety shows, and films. He is also an active stage actor as a member of the theater company Hero Hero Q Company. Starting in the latter half of the 2010s, he expanded his career to include voice acting for anime and dubbing foreign works.

As a voice actor, Yūki Okada is known for his role as Lassie Ichidō in the 2026 anime series High School! Kimengumi. This series is a new adaptation of the classic manga by Motoei Shinzawa, and Okada voices the dog character Lassie, who is a pet of the protagonist family. Other notable anime voice credits include a teacher in Yano-kun's Ordinary Days, Salvatore in Dungeons & Television, a biting zombie in Zom 100: Bucket List of the Dead, a clerk in Blue Orchestra, and various background characters such as a Renril militiaman and a Uralis soldier in To Your Eternity. He also contributed additional voices to the 2021 film Gintama: The Very Final. In addition to his voice work, Okada continues to appear in live-action projects, including the 2023 film Blue Giant.