Stephen Shin is a fictional character appearing in comic books published by DC Comics. He is a supporting character of Aquaman who debuted during "The New 52" reboot. Stephen Shin first appeared in Aquaman (vol. 7) #2 (December 2011) and was created by Geoff Johns and Ivan Reis.

Shin appears in the DC Extended Universe films Aquaman and Aquaman and the Lost Kingdom, portrayed by Randall Park.

Stephen Shin is a marine biologist who befriends lighthouse keeper Tom Curry and his son with the sea-dwelling Atlanna, Arthur Curry, the future Aquaman. He has more knowledge of Atlantis than any other surface-dweller. Shin helps Arthur develop his powers, but turns on his protege when he refuses to reveal the location of Atlantis.

Some years later, Aquaman and Mera visit Shin, asking for his help to identify strange sea creatures. He does, but is angered when Aquaman refuses to let him keep one.

It is later revealed that Shin previously knew Black Manta and met Arthur and Thomas Curry when the former was a child.

Stephen Shin is later seen in the underwater Triton Base while Aquaman is fighting a sea monster called the Karaqan. When a diver named Coombs is attacked by sharks and saved by Aquaman, Shin brings him to the Triton Base for treatment. During this time, Coombs is experimented on by Dr. Edrid Orson and given shapeshifting abilities, which he primarily uses to assume the abilities of aquatic animals by the time Shin and Dr. Voss arrived at Dr. Orson's laboratory.

Stephen Shin has genius-level intellect.