Jessica Claus is the version of Mrs. Claus who appears in the Rankin/Bass special Santa Claus is Comin' to Town, voiced by Robie Lester. She was the schoolteacher of Sombertown before Kris Kringle started to bring the children toys. At first she did not condone the behavior of Kris, as he was breaking Burgermeister Meisterburger's law declaring that toys were illegal in Sombertown after he enacted it following being injured by one. But he then gave her a baby doll and she began to fall in love with him and realize how silly the Burgemeister's law is.
Jessica decided to help him and the Kringles get toys into the city and helped craft plans, including hiding toys in the stockings and going through the chimney. She was one of his best allies in the town and told him how to bring toys to the children without being caught. Unfortunately, the Burgermesiter arrests Kris after luring him into a trap, as well the other Kringles and Winter Warlock, leaving Jessica brokenhearted. She tries to intercede for them, only have be given her packing orders, jeered by the whole town. Eventually, she formulated a plan of escape by using some of Winter's magic-feed-corn, which he had to allow reindeer fly and escaped the prison through this means.
After the rescue was a success, Jessica and Kris, now taking on his actual name of Claus, were married under the very first Christmas tree.
In Rudolph and Frosty's Christmas in July, Santa calls his wife Jessica, and she mentioned the doll he gave her when they first met, in keeping with the movie's tying together the continuity of almost all the Rankin/Bass Christmas specials up to that point.