Sign (Korean: 싸인) is 2011 South Korean television series, starring Park Shin-yang, Kim Ah-joong, Jun Kwang-ryul, Jung Gyu-woon and Uhm Ji-won.

It aired on SBS TV from January 6 to March 10, 2011 on Wednesdays and Thursdays at 21:55 for 20 episodes.

The story details the partnership between Go Da-kyung (Kim Ah-joong), a warm-hearted rookie and Yoon Ji-hoon (Park Shin-yang), a high-tempered forensic doctor, who find themselves an unlikely pair for solving cases.

A Japanese remake titled Sign: Houigakusha Yuzuki Takashi no Jiken (サイン―法医学者 柚木貴志の事件―) will air on TV Asahi in July 2019.

It is produced by Total Media Communication.