Ukraine participated in the Eurovision Song Contest 2021 with the song "Shum" written by Kateryna Pavlenko, Taras Shevchenko and Ihor Didenchuk. The song was performed by the band Go_A, which were announced by the Ukrainian broadcaster Public Broadcasting Company of Ukraine (UA:PBC) as the Ukrainian representative for the 2021 contest on 18 March 2020 after they were due to compete in the 2020 contest with "Solovey" before the event's cancellation. The song "Shum" was selected as the Ukrainian entry on 1 February 2021 and announced on 4 February 2021.

The Eurovision Song Contest 2021 was the 65th edition of the Eurovision Song Contest. It took place in Rotterdam, Netherlands, following the country's win at the 2019 contest with the song "Arcade" by Duncan Laurence. The Netherlands was set to host the 2020 contest, before it was cancelled due to the COVID-19 pandemic. Organised by the European Broadcasting Union (EBU) and host broadcasters Nederlandse Publieke Omroep (NPO), Nederlandse Omroep Stichting (NOS) and AVROTROS, the contest was held at Rotterdam Ahoy, and consisted of two semi-finals on 18 and 20 May, and a final on 22 May 2021. The three live shows were presented by Dutch television presenters and singers Chantal Janzen, Edsilia Rombley and Jan Smit, and Dutch YouTuber and make-up artist Nikkie de Jager.