성동일(成東鎰, 1967년 4월 27일 ~ )은 대한민국의 배우이다.

대학교 : 유한공업전문대학 기계설계학과

2013년 SBS 연기대상 중편드라마 부문 남자 우수연기상
2013년 MBC 방송연예대상 쇼버라이어티부문 남자 우수상
2010년 KBS 연기대상 조연상
2010년 제7회 맥스무비 최고의 영화상 남자조연배우상
2009년 제17회 이천 춘사 대상영화제 남우조연상
2005년 MBC 연기대상 특별상 진행부문

Sung Dong-il (born April 27, 1967) is a South Korean actor. After being recruited at the 1991 SBS open talent auditions, Sung has built a prolific acting career in film and television. Following years of supporting roles in TV dramas, Sung's film career was jumpstarted by hit romantic comedy 200 Pounds Beauty in 2006. Subsequently, he became one of Korea's most reliable supporting actors, displaying his comic skills and easy charm in films such as Take Off, Foxy Festival,Children..., The Suicide Forecast, and The Client. He also had major roles in The Suck Up Project: Mr. XXX-Kisser, and 3D blockbuster Mr. Go. On the small screen, Sung garnered praise as a villain in The Slave Hunters, and a gruff but caring father in Reply 1997 and its spin-off Reply 1994.

Sung gained a new surge of popularity in 2013 when he and his son Joon starred in Dad! Where Are We Going?, a reality/variety show featuring five male celebrities and their children on camping missions.

成东镒（朝鲜语：성동일，1967年4月27日－），韩国男演员。1991年SBS第1期公开招募演员。