Elton John performed the song regularly on his world tour in 1980, including at his free concert in Central Park, a few blocks away from Lennon's apartment in The Dakota. On 9 December 1980, the day after Lennon's murder, Queen performed "Imagine" as a tribute to him during their Wembley Arena show in London. In 1983, David Bowie performed it in Hong Kong during his Serious Moonlight Tour, on the third anniversary of Lennon's death. On 9 October 1990, more than one billion people listened to a broadcast of the song on what would have been Lennon's 50th birthday. Ratau Mike Makhalemele covered the song on an EP of Lennon covers in 1990. In 1991–92, Liza Minnelli performed the song in her show at Radio City Music Hall. Stevie Wonder gave his rendition of the song, with the Morehouse College Glee Club, during the closing ceremony of the 1996 Summer Olympics as a tribute to the victims of the Centennial Olympic Park bombing. In 2001, Neil Young performed it during the benefit concert America: A Tribute to Heroes. Madonna performed "Imagine" during the benefit Tsunami Aid: A Concert of Hope. Peter Gabriel performed the song during the 2006 Winter Olympics opening ceremony. Herman Cain, then the CEO of Godfather's Pizza, performed a parody of "Imagine", identified as "Imagine There's No Pizza", before the Omaha Press Club in 1991, which became a viral video when he ran for President of the United States 20 years later.
Since 2005, "Imagine" has been played at 11:55 p.m before the New Year's Eve ball drop at New York City's Times Square. Beginning in 2010, the song has been performed live by the headlining artist; first by Taio Cruz, then in 2011 by CeeLo Green, in 2012 by Train, in 2013 by Melissa Etheridge, in 2014 by O.A.R., in 2015 by Jessie J, in 2016 by Rachel Platten, in 2017 by Andy Grammer, in 2018 by Bebe Rexha, in 2019 by X Ambassadors, in 2020 by Andra Day, in 2021 by KT Tunstall, in 2022 by Chelsea Cutler, in 2023 by Paul Anka, in 2024 by Mickey Guyton, and in 2025 by Tones And I. However, Green received criticism for changing the lyric "and no religion too" to "and all religions true", resulting in an immediate backlash from fans who believed that he had disrespected Lennon's legacy by changing the lyrics of his most iconic song. Green defended the change by saying it meant to represent "a world [where you] could believe what [you] wanted". The event got media attention outside of the US, with Britain's The Guardian stating "Lennon's original lyrics don't praise pluralism or interchangeable religious truths—they damn them".
Numerous artists have recorded cover versions of "Imagine". Joan Baez included it on 1972's Come from the Shadows and Diana Ross recorded a version for her 1973 album, Touch Me in the Morning. In 1995, Blues Traveler recorded the song for the Working Class Hero: A Tribute to John Lennon album and Dave Matthews has performed the song live with them. American singer and guitarist Eva Cassidy recorded a version for her 2002 album of the same name; this version failed to reach the top 100 in the United Kingdom but peaked at number 35 on the UK Indie Chart. A Perfect Circle released a rendition of the song on their 2004 album Emotive. Dolly Parton recorded the song for her 2005 covers album Those Were the Days. David Archuleta reached number 36 in US and number 31 in Canada with his rendition. A cover version of the song, performed by Italian singer Marco Carta, entered the top 20 in Italy in 2009, peaking at number 13.
Seal, Pink, India.Arie, Jeff Beck, Konono Nº1, Oumou Sangaré and others recorded a version for Herbie Hancock's 2010 album The Imagine Project. In February 2011, the recording won a Grammy award for Best Pop Vocal Collaboration.
"Imagine" was performed as part of the closing ceremony of the 2012 Summer Olympics. Performed by the Liverpool Philharmonic Youth Choir and the Liverpool Signing Choir, the choirs sang the first verse and accompanied Lennon's original vocals during the rest of the song. A cover performed by Emeli Sandé was also used by the BBC for a closing montage that ended its coverage. "Imagine" subsequently re-entered the UK Top 40, reaching number 18.
In 2014, to celebrate 25 years of UNICEF's Convention on the Rights of the Child, the organisation launched an initiative using the song. Performers including Ono, Hugh Jackman and ABBA announced the initiative at an event at the UN General Assembly in New York, with the intention of spreading the message that every voice matters. To do this, various celebrities and singers recorded cover versions of the song, which can be played on a downloadable app for people around the world to virtually sing with the celebrities and then share the videos on social media with related hashtags.
In 2015, American singer and songwriter Lady Gaga performed the song at the 2015 European Games opening ceremony. The song was played for 70,000 people in Baku, Azerbaijan, that served as host of the event. In 2018, the song was performed at the 2018 Winter Olympics opening ceremony in Pyeongchang (South Korea). The same year Yoko Ono released a solo rendition of the song, the first since she received credit as co-writer.
In 2020, amid the first COVID-19 lockdowns, Gal Gadot and a number of other celebrities performed an online version of the song intended to raise morale in the face of the pandemic. The performance was poorly received by audiences, many of whom criticized it for being a tone-deaf message from a group of socialites and members of the international elite who were largely unaffected by the pandemic. In June 2020, actor Chris O'Dowd, who appeared in the online version of the song, said the criticisms of the project were "justified", referring to the video as "creative diarrhoea".
A pre-recorded version of the song performed by John Legend, Keith Urban, Alejandro Sanz and Angélique Kidjo, with musical arrangement by Hans Zimmer, was featured in the opening ceremony for the 2020 Summer Olympics in Tokyo in July 2021, and another pre-recorded cover version again as a theme song in the opening ceremony of the 2022 Winter Olympics in Beijing in February 2022.
During the 2022 Russian invasion of Ukraine, Lennon's son Julian Lennon for the first time covered his father's song, calling on world leaders and everyone who believes in the song's sentiment of hope and peace to stand up for refugees.
Garth Brooks and Trisha Yearwood covered the song in November 2023 during the funeral for Former First Lady of the United States, Rosalynn Carter. On January 9, 2025, Brooks and Yearwood covered the song again during the State Funeral of Former President Jimmy Carter.
An abridged version of the song was performed by Filipino cardinal Luis Antonio Tagle in 2019 at the Araneta Coliseum garnered controversy when the fake news site LifeSiteNews unearthed a video of Tagle in 2025 as part of a by ultraconservative politicians and Catholics to elect a conservative pope, insinuating that Tagle was condoning the song's anti-religious message. The rendition has since been revealed to be an abridged version where he skipped the opening verses and begun at the chorus, as well as replacing the line "A brotherhood of man" with "A brotherhood for all" in the final verse.