Yoo In-sik (유인식) is a South Korean television director born in 1972. Beginning his career as a producer and director at SBS in 1999, he has directed several of South Korea's highest-rated television dramas across action, medical, and legal genres.

His major directorial credits include Giant (2010), History of a Salaryman (2012), You're All Surrounded (2014), the Dr. Romantic series (2016–2023), Vagabond (2019), and Extraordinary Attorney Woo (2022), the latter earning him Best Director at the 59th Baeksang Arts Awards. He also directs the period espionage drama 100 Days of Deception (2026).