Susan Banks is a fictional character on NBC's daytime drama Days of Our Lives. She was played by Eileen Davidson from November 4, 1996, to April 8, 1998, and again in 2014 and 2017. Susan is the eccentric mother of Elvis "EJ" DiMera, and once acted as Kristen Blake's doppelganger. In November 2011, it was announced that Brynn Thayer would take over the role of Susan, since Davidson was committed to The Young and the Restless. Thayer made her brief one-off appearance as Susan on December 7, 2011.

Days of Our Lives is an American television soap opera that aired on the network NBC from 1965 to 2022 and currently streams new episodes on Peacock. The soap is one of the longest-running scripted television programs in the world, airing nearly every weekday since November 8, 1965. A co-production of Corday Productions and Sony Pictures Television, the series was created by husband-and-wife team Ted Corday and Betty Corday. During Days of Our Lives' early years, Irna Phillips served as a story editor for the program and many of the show's earliest storylines were written by William J. Bell, who would depart the series in 1975 to focus full-time on The Young and the Restless, which he created for CBS in 1973. Following the 2007 cancellation of Passions, Days of Our Lives remained the only soap opera airing on NBC. On August 3, 2022, NBCUniversal announced that it would relocate the series exclusively to its Peacock streaming service beginning September 12 after 57 years on the network and leaving NBC as the only Big Three network without a daytime serial.