Lee Jang-woo (; born June 1, 1986) is a South Korean actor and singer. He is best known for his roles in the television series Glory Jane, I Do, I Do, My Only One and Homemade Love Story. Lee also became popular after being paired with Ham Eun-jung in the third season of fictional marriage reality show We Got Married.
In 2009, Lee, No Min-woo, and Hyun Woo formed the K-pop project group 24/7, which has since disbanded after releasing the single "24 Hours a Day, 7 Days a Week". Lee also appeared in a 2011 music video for his cousin, singer Hwanhee.
On June 22, 2023, it was confirmed that Lee was in a relationship with actress Jo Hye-won. On June 21, 2025, Hunus Entertainment confirmed that the couple would be getting married in November. Lee and Jo married on November 23, 2025.