Ice (Tora Olafsdotter) is a superheroine appearing in American comic books published by DC Comics. First appearing in Justice League International #12 (April 1988), the character was created by Keith Giffen, J. M. DeMatteis, and Kevin Maguire. She is a member of the Justice League who possesses cryokinetic abilities and is often associated with fellow superhero Fire. The character has also been associated with the Global Guardians.

Ice has appeared in various media outside comics, primarily television. Jennifer Hale voices Ice in Batman: The Brave and the Bold, while Kimberly Oja portrays her in Justice League of America.

Created by Keith Giffen, J. M. DeMatteis, and Kevin Maguire, she first appeared in Justice League International #12 (April 1988).

Ice is a separate character from Icemaiden, although the two are similar in appearance, group affiliation, and powers. When Icemaiden first appeared, she had blue skin and pointy ears, and was named Sigrid Nansen. When the character joined Justice League International, the comic book creators believed that her real name had never been given but they were mistaken.

After Ice is killed, the original Icemaiden joins the Justice League. A backstory revealed that she is the first Icemaiden, and quit the Global Guardians when Tora appeared.

An alternate origin was revealed in Justice League: Generation Lost #12 (2010), written by Judd Winick and art by Fernando Dagnino Guerra.

The princess of an isolated tribe of magic-wielding Norsemen, Tora Olafsdotter has the natural ability to create and manipulate ice.

In the Danish graphic novel Superman: A Tale of Five Cities, Superman and Lois Lane visit Oslo and encounter Ice (Isjomfruen), a local superhero, and her sister Ice Flower (Isblomst), in Frogner Park.