Pam Willis is a fictional character from the Australian soap opera Neighbours, played by Sue Jones. Pam was introduced by executive producer Don Battye as the matriarch of the newly introduced Willis family. Jones initially turned down an offer to appear in the show, before changing her mind. She was cast as Pam after a screen test. She made her first screen appearance during the episode broadcast on 6 August 1990.

Pam was a district nurse and a highly valued member of the community. Pam and her husband, Doug (Terence Donovan) had a solid marriage until they began to neglect each other due to work. Pam also came close to having an affair with their neighbour Jim Robinson (Alan Dale), while Doug had a one-night stand with Jill Weir (Lyn Semler). Pam was involved in a storyline surrounding the subject of mercy killing in 1992. She was accused of murdering Garth Kirby (Roy Baldwin), a seriously ill patient, but eventually her name was cleared.

The character departed on 15 September 1994, after she and Doug were written out of the show. Two years later, Jones briefly reprised her role during Peta Brady's exit storyline and departed on 1 April 1996. In 2014, it was announced Jones had reprised her role once again and Pam returned on 5 May 2014. She returned again on 15 April 2016.

Sue Jones initially rejected the offer to appear in Neighbours, as she was worried that she would be "selling her theatrical soul". After losing a part in a play, she changed her mind. She was given the role of Pam after attending a screen test.

Upon her introduction, Pam was a full-time mother to her four children: Adam (Ian Williams), Gaby (Rachel Blakely), Brad (Scott Michaelson) and Cody (Amelia Frid). Shortly after settling into Ramsay Street, Pam decided to return to nursing and after re-qualifying, she was given a job at the local hospital, where her duties often meant she got involved in difficult situations. Through her job, Pam often interacted with other characters and she became "a trusted and central figure" within the community. Pam was even-tempered, a member of the school committee and an active sportswoman. She was anxious that her eldest son, Adam, completed his studies, so he could study medicine.

In her fictional backstory, Pam met her future husband Doug Willis (Terence Donovan) when he accepted a dare to travel naked across town in the taxi she was driving. Pam loved Doug's "wicked" sense of humour. The couple went through several crises. They were faced with "a terrible blow" when their second child, John died due to cot death. They also faced financial problems when the building trade slumped and they briefly split due to an argument.

Pam and Doug's solid marriage soon ran into trouble when they began to neglect each other. Doug was devoting his time to his construction business, while Pam's job as a district nurse gave her increasing independence. Jones said that because Pam and Doug had been neglecting one another for a while, she was not surprised that they were having problems. When Pam nursed Jim Robinson (Alan Dale) through his heart problems, she became attracted to him. Meanwhile, Doug had attracted the unwelcome attentions of Jill Weir (Lyn Semler) and they had a one-night stand. Jill becomes obsessed with Doug and wants a relationship. When she tells other residents that she and Doug will set up home together, he informs Pam about his affair. The confession shocks Pam, but she is "amazed and extremely hurt" when Doug tells her he was unfaithful because of her association with Jim. Pam retaliates by forcing Doug to move out of their house. Jones enjoyed acting out Pam and Doug's marriage problems, saying "It's great to have a really meaty storyline." Jones believed that it the marriage was worth saving and hoped the couple would sort things out. The actress added "They might even end up with a stronger relationship than they had before."

The duo's marital issues continued during 1994. Pam tries everything she can to keep her family united. But the situation worsens when Doug begins heavy drinking upon discovering that he gained his Lassiter's job out of sympathy. While Pam was going through menopause, she began to feel that Doug was not paying her enough attention. Her spirits were raised when she met Tom Weaver (George Mallaby) at an art class. Tom made his interest in Pam clear from the start and he eventually confronted her in front of Doug – even going as far as to ask her to marry him. A "horrified" Doug refused to believe that nothing had happened between Pam and Tom, and he temporarily moved out.