Emperor of the Sea (Korean: 해신; Hanja: 海神; RR: Hae-sin; literally "Sea God") is an epic South Korean television drama series starring Choi Soo-jong, Chae Shi-ra, Song Il-kook، Soo Ae and Chae Jung-an It aired on KBS2 from November 24, 2004, to May 25, 2005, on Wednesdays and Thursdays at 21:55 for 51 episodes. The period drama is based on Choi In-ho's 2003 novel Hae-sin, which depicts the life of Jang Bogo, who rises from a lowly slave to a powerful maritime figure who dominated the East Asia seas and international trade during the Unified Silla dynasty.

The series was received extremely well, holding the number one spot in the ratings for majority of the weeks it aired. It was also exported to eight countries earning approximately US$1.8 million in profits.

The filming set in Wando County, South Jeolla Province also became a tourist attraction.