Leonard Gordon Goodman (25 April 1944 – 22 April 2023) was an English professional ballroom dancer, dance teacher, and dance competition adjudicator. He appeared as head judge on the British television programme Strictly Come Dancing – in which various celebrities compete for the glitterball trophy – from its beginning in 2004 until 2016, and on the American television programme Dancing with the Stars from 2005 until 2022. He also ran a ballroom dance school in Dartford, Kent.

Goodman was born in Farnborough, Kent, on 25 April 1944. He grew up in Bethnal Green, East London, where his grandfather worked as a costermonger, selling fruit and vegetables. As a child, Goodman was wheeled around in his grandfather's barrow and tasked with making sure the vegetables appeared to be fresh. He moved to Blackfen when he was six years old and later attended Westwood Secondary Modern School in his teens, where he was a member of the cricket team.

Goodman was an apprentice welder for Harland and Wolff in Woolwich. He started dancing at the late age of 19, after his doctor recommended it as therapy for a foot injury.

Goodman turned professional, won various competitions, and retired from dancing after winning the British Championships at Blackpool in his late twenties. He was a recipient of the Carl Alan Award, in recognition of outstanding contributions to dance and in 2006 and 2007 a show in which he appeared was nominated for the Emmy Award in the Outstanding Reality/Competition Program category.

Goodman appeared as head judge on the BBC One dance competition Strictly Come Dancing from its inception in 2004 until 2016. He appeared on the panel with Arlene Phillips, Bruno Tonioli, and Craig Revel Horwood; Phillips was later replaced by Alesha Dixon and then Darcey Bussell. In July 2016, Goodman announced he would be leaving the show at the end of that year's series. His final appearance was on the Christmas Day Special. On 9 May 2017, it was announced that Shirley Ballas would succeed Goodman as head judge. Goodman had also appeared on the original Come Dancing series as a judge.

Goodman had been the sole head judge on Strictly Come Dancing's American adaptation, Dancing with the Stars. He had appeared with fellow judges Carrie Ann Inaba and Bruno Tonioli since the show's inception and for five seasons with alternating fourth judges and the brother-sister pair of Julianne Hough and Derek Hough. He missed much of season 19 and season 23 due to his responsibilities in the UK, and he did not appear as a judge in season 21 and season 29, but presented short segments on dance styles during the latter season. On 14 November 2022, Goodman announced during the season 31 semifinals broadcast that he would be retiring from the show to spend more time with his family in Great Britain. Goodman died from cancer on 22 April 2023.

After Goodman's death, the Mirrorball Trophy was renamed the Len Goodman Mirrorball Trophy, season 32 in his honor. On 24 October 2023, Dancing with the Stars Season 32 paid tribute to the late Goodman, when many of the original dancers returned to perform a choreographed group waltz to "Moon River". Goodman's wife was present for the performance.

In 2005, Goodman voiced Professor in the five-time Emmy Award–winning children's program Auto-B-Good.