Judge Cassandra Anderson is a fictional law enforcer and psychic appearing in the British science fiction comics 2000 AD and the Judge Dredd Megazine. Created by writer John Wagner and artist Brian Bolland, Anderson made her debut as a supporting character in the Judge Dredd story "Judge Death" (2000 AD #150, February 1980). The character's popularity with readers led to her starring in her own series, Anderson: Psi-Division, which (since 1988) has been written almost exclusively by Alan Grant, often working with artist Arthur Ranson until 2005; Boo Cook drew a majority of the stories until 2012, since which a number of different artists have worked on the strip. In 2012, the character appeared in the film Dredd, played by Olivia Thirlby.

John Wagner created both Judge Death and Judge Anderson for the Judge Dredd story "Judge Death", the latter helping introduce the Psi-Judges, which were seen as a natural progression. A popular misconception is that artist Brian Bolland based the character on Debbie Harry, due to the mistaken belief that he had recently drawn the singer into an advertisement for the Forbidden Planet 2 store in London. 2000 AD's former editor Kelvin Gosnell has recounted that the comic's assistant editor Deirdre Vine at the time was the inspiration for the character, having been surreptitiously photographed across the office and the snap then given to Bolland who was told to, "Make Anderson look like that."

Shortly afterwards, Alan Grant began to co-write Judge Dredd with Wagner. When Anderson got her own series, Wagner and Grant also co-authored those stories. This collaboration lasted until 1988, when their differences of opinion about how to develop Dredd's character came to a head while planning the last episode of the Judge Dredd story "Oz". After that, Grant wrote Anderson's stories on his own, while Wagner wrote Dredd's.

Grant later said: "A lot of Anderson counts among what I think of as my best work. The fact that I've had one of the best storytellers in the business, Arthur Ranson, along for most of the ride makes it even more memorable for me."

Like the mythical Cassandra (the sister of Paris of Troy), Judge Anderson (b. 2080) has psychic powers, chiefly telepathy and precognition. These abilities made her a member of Mega-City One's 'Psi Division' of Judges.

The character debuts during the first attack by Judge Death of the Dark Judges (a group of nihilistic undead Judges). During this encounter, Anderson is possessed by Judge Death but then thwarts him by having herself entombed in "Boing", a tough but porous material. This lasts until the Dark Judges free her to release Judge Death, whereafter Anderson returns to active duty. She is instrumental in stopping this first attack by the Dark Judges, as well as several others. Due to being possessed and manipulated by them, Anderson develops a personal hatred of the Dark Judges.

Anderson is prominent in her Division and gains Dredd's respect. Unlike Dredd, she is a critic of the weaknesses in the judicial system of Mega-City One, has a sense of humour, forms personal friendships with fellow Judges, and permits herself doubt and remorse. However, she is still capable and willing like any Judge of using extreme or lethal force against anyone, men, women or children when necessary. Because her determination is similar to Dredd's, the two of them co-operate effectively on several missions.

In the story "Engram", Anderson regains memories of an abusive father and is shocked to learn that her Division was responsible for blocking them from her mind in the first place. This, together with the events of "Leviathan's Farewell" (concerning the suicide of her friend Judge Corey), "Shamballa", "The Jesus Syndrome" and "Childhood's End", prompts Anderson to resign from the judicial system. After several adventures in outer space, she returns to Mega-City One. Dredd and Anderson are both considered veterans and regarded with awe by less experienced judges.