Lisa Dingle (also Clegg) is a fictional character from the British soap opera Emmerdale, played by Jane Cox. Lisa's storylines include being raped by her colleague Derek Benrose (Stephen Bent), becoming a parent in later life, assaulting a police officer, suffering an angina attack, dealing with her daughter's psychosis and discovering that her husband Zak (Steve Halliwell) has fallen in love with their lodger Joanie Wright (Denise Black), which led to their divorce after 18 years of marriage. On 7 May 2018, the character left the village and Emmerdale confirmed Cox was taking a sabbatical from the show. Lisa returned on 8 March 2019, and revealed that she had been diagnosed with amyloidosis. Cox then announced that she had quit her role, and that Lisa would be killed-off. Lisa made her final on-screen appearance during the episode broadcast on 24 May 2019. Cox briefly returned for voiceovers on 6 June 2019 and for several more in October and November 2020 and February 2024.

Lisa Clegg was first introduced by producer Mervyn Watson in 1996 who cast Jane Cox for the role. Lisa first appeared in August 1996, as a potential love interest for Zak Dingle (Steve Halliwell) after his wife Nellie Dingle (Sandra Gough) left to care for her father in Ireland.

Jane Cox really loved the idea to play Lisa Clegg in Emmerdale. In an interview shortly after landing the role of Lisa, Jane stated [...] 'I was told that Lisa was a big lady and most comfortable in wellington boots [...] . Jane Cox had originally auditioned for the role of Nellie Dingle. However Mervyn Watson gave the role to Sandra Gough, Cox was pleased she got the part of Lisa Clegg instead because she really enjoyed the character. [...] She's very practical and down to earth. I like the fact that she spends most of the time in a boiler suit but can be sassy.[...]

On 8 March 2019, during a special episode to commemorate International Women's Day, the character returned after a temporary break and told Charity Dingle (Emma Atkins) that she had been diagnosed with terminal heart condition amyloidosis. After the episode aired, Cox announced that she had quit Emmerdale after nearly 23 years, and Lisa was killed off on 23 May 2019. Cox made a brief return for a voiceover on 6 June 2019, as each family member read a letter from Lisa. Cox also returned for several voiceovers in 2020, as part of Belle Dingle's mental health storyline. The voiceovers were broadcast over the course of October and November 2020. On 15 February 2024, Lisa was heard whilst Belle was reading her letter which Lisa wrote for Belle for her wedding.

Lisa meets Zak Dingle (Steve Halliwell) and they develop feelings for one another. However, Lisa nearly accepts a marriage proposal from Zak's brother Albert Dingle (Bobby Knutt). but Lisa's former husband, Barry Clegg (Bernard Wrigley), stopped the wedding and Zak declares his love for her. Barry causes the Dingle's barn to explode when he builds a rocket. Despite their problems, Zak and Lisa marry. Various family troubles kept them busy during that year, but Zak and Lisa were surprised when Lisa went out to the barn and went into labour, when Lisa didn't know she was pregnant. The arrival of baby Belle (Emily Mather; later Eden Taylor-Draper) served to deepen Zak and Lisa's marriage, even surviving the nightmare that was Zak's ex-wife Nellie's stay in the village. Lisa was deeply saddened when Zak's son Butch (Paul Loughran) was killed in a bus crash in the village. She even moved out when it was clear Zak blamed her as she'd fixed the brakes on the vehicle before it crashed. After a few months, Zak realised he could not live without Lisa and begged her to move back in.

In 2001, tragedy hit again when Zak was diagnosed with testicular cancer. Zak overcame the illness with Lisa's support and repaid his wife by inviting his mother Peg to move in. With Peg around, tensions in the Dingle household reached fever pitch. When she went, everyone was relieved. The family was split again when Zak went off to South America in 2002 in search of the Dingle treasure – without Lisa's blessing. With her husband away, Lisa felt vulnerable – especially with Zak's brother, Shadrach (Andy Devine), coming on to her all the time. In the end, Lisa resorted to violent tactics to make Shadrach back off and was relieved he got the message. Although she enjoyed a few dates with Bob Hope's (Tony Audenshaw) brother Eddie (Nigel Betts), it was clear that Zak was still the man for Lisa – a fact confirmed by his return and their subsequent reunion.

Lisa and Zak were shocked to discover that Zak's granddaughter Debbie (Charley Webb) was pregnant and no one was aware of her pregnancy. Lisa felt she had let Debbie down and was determined to give her all the support she needed to bring up baby Sarah. Unfortunately, Debbie couldn't cope with being a mother. She did everything she could to avoid looking after her daughter which infuriated Lisa, causing many rows and this left Lisa at the end of her tether. So when Debbie gave baby Sarah to Emily Kirk (Kate McGregor), who then disappeared, Lisa hit the roof. Unable to bear the sight of Debbie, Lisa was relieved when she departed the Dingle home.

More tragedy was to hit the family when Zak's son, Sam (James Hooton), announced his girlfriend Alice Wilson (Ursula Holden-Gill) was pregnant – only for that news to be followed by the revelation that Alice had cancer. Lisa proved to be the backbone of the family as everyone tried to prepare Sam for Alice's death and looking after their baby son, Samson, alone. The morning of the competition in Emmerdale's 5000th episode, Lisa accidentally knocked out Val Lambert (Charlie Hardwick) by pushing her down some stairs while carrying a big bag of linens. Lisa and Val had been feuding, and Lisa worried Val might have it out for her. Eli Dingle (Joseph Gilgun) tied and gagged Val whilst Lisa was gone, intending to ransom her. Val was fuming at the Dingles until Lisa accidentally let it slip that Eric Pollard (Chris Chittell) was planning the wedding for that day. Val and Eric did get married, in front of friends and family.