Owlman (Thomas Wayne, Jr.) is a fictional character appearing in comic books published by DC Comics. A supervillainous alternate-universe counterpart of Bruce Wayne / Batman, he is depicted as the adult version of Wayne's deceased older brother, who in most iterations dies as a child, before Bruce is born. In The New 52, the primary continuity Owlman, originally depicted as the asylum-bound Boomerang Killer, is retroactively revealed to be still alive, stolen from his parents as a child, and working in the service of the Court of Owls under the name Lincoln March.

Owlman is voiced by Diedrich Bader and James Woods in the 2008 animated series Batman: The Brave and the Bold and the 2010 animated feature film Justice League: Crisis on Two Earths respectively. Jayda Eyles portrays a young gender-swapped version of the character, Samantha Wayne, in the 2022 third season of Pennyworth in a recurring role, after being introduced as a baby in the 2020 second season finale. In December 2022, series showrunner Bruno Heller expressed interest in the character becoming a vigilante herself as the series approached the timeline of Gotham. Damon Dayoub portrays Lincoln March in the 2023 television series Gotham Knights.