David Platt (also Tilsley) is a fictional character from the British ITV soap opera Coronation Street. He was born on-screen during the episode broadcast on 26 December 1990. He was played by Thomas Ormson from his first appearance until 15 March 2000, when Ormson left. Jack P. Shepherd took over the role and made his first on-screen appearance on 26 April 2000. In July 2019, Shepherd took a four-month break from the show.

Following the death of his serial killer stepfather Richard Hillman (Brian Capron) and the departure of his biological father, Martin Platt (Sean Wilson), the character took a darker turn in 2006, becoming increasingly rebellious and antagonistic, deprived of a male role model. As a result, he has notably feuded with Phil Nail (Clive Russell), Bill Webster (Peter Armitage), Charlie Stubbs (Bill Ward), Gary Windass (Mikey North), Jason Grimshaw (Ryan Thomas), Callum Logan (Sean Ward) and Clayton Hibbs (Callum Harrison), as well as his sister, Sarah Platt (Tina O'Brien), and mother, Gail Platt (Helen Worth). However, in recent years, he has mellowed into a more comedic and rounded character, focused on what is best for his family, opposed to causing trouble for them. He has been married twice, to Kylie (Paula Lane) and Shona Platt (Julia Goulding).

A character that viewers saw born in the soap, David's birth was part of the Coronation Street Christmas storyline in 1990, since David was days old, and for most of his childhood, the character was played by Thomas Ormson. He was the only child of couple Martin and Gail Platt (Sean Wilson and Helen Worth), although Gail had two children from her first marriage. In 2000, Jack P. Shepherd took over the role. He made his first appearance on 26 April 2000.

This was the first time that male rape had been a storyline in the programme's history, although such a theme had occurred on other soap operas. Ryan Clayton was cast as Josh in January 2018.

In January 2018, it was confirmed that Sean Wilson would be returning to Coronation Street after a thirteen-year absence as David's father Martin as part of the rape storyline.

David is the son of Martin (Sean Wilson) and Gail Platt (Helen Worth). He is born on Christmas Day, in 1990. When David is a toddler, Martin's friend, Carmel Finnan (Catherine Cusack), tries to kidnap him. She also poses as his mother to other characters. Carmel subsequently tries to frame Gail for pushing her down the stairs and is revealed to be mentally ill.

In 2000, a nine-year-old David becomes jealous of the attention his newborn niece Bethany Platt (Amy and Emily Walton) is getting. He decides to get attention by having himself arrested for shoplifting. In 2001, Gail and Martin divorce, after Martin has an affair with Rebecca Hopkins (Jill Halfpenny). Upset, David begins misbehaving in the hope that they will get back together. David becomes the target of a school bully and, despite Gail's advice to ignore him, he becomes violent and gets into fights. His behaviour worsens when Gail marries Richard Hillman (Brian Capron) in July 2002, but he comes to accept Richard. In March 2003, Richard is revealed to be a serial killer and tries to kill himself, Gail, David, Bethany and her mother—David's sister—Sarah Platt (Tina O'Brien) by driving them into the local canal. Gail, Sarah, David and Bethany are all rescued, while Richard drowns. In the years following, David develops a penchant for lying and scheming both at home and at school.

David is unhappy with Gail's relationship with Phil Nail (Clive Russell) and does not trust Phil, due to Richard's behaviour. He begins a hate campaign against Phil. Phil reaches a breaking point with David and throws him up against a wall, threatening to beat him up. David tells Gail, but Phil lies to her. Gail believes him and slaps David, unaware that he is telling the truth. Gail receives a card addressed from Richard. She suspects Phil of sending the cards. Realising David is behind the scam, Phil throws David across the table in front of Gail. An angry Gail ends their relationship. The Platt family continue to receive cards from Richard and Gail realises that David is the culprit. Gail blames herself for David's behaviour. In December 2006, David discovers Sarah's grandmother Ivy Brennan's (Lynne Perrie) diary and reads it, and is shocked that Gail had wanted to abort him, but he understands this after Gail told him that Ivy had been having a rough time since the death of her son and Gail's then-husband, Brian Tilsley (Christopher Quinten). He develops romantic feelings for Maria Sutherland (Samia Longchambon), but is annoyed she is enjoying an affair with Charlie Stubbs (Bill Ward). Charlie threatens David into silence. David tries to blackmail Charlie, who tries drowning David in a bath to rid of him, but Maria walks in and saves him. In January 2007, Tracy Barlow (Kate Ford) murders Charlie, staging it to look like self-defence. David offers to testify for Tracy that he saw Charlie attack her on the condition that she sleeps with him. Tracy agrees, but the prosecution proves David's testimony to be lies.