The 2020–21 Irish Cup (known as the Sadler's Peaky Blinder Irish Cup for sponsorship purposes) was the 141st edition of the premier knock-out cup competition in Northern Irish football since its inauguration in 1881. The competition began on 27 April 2021 and concluded with the final at Mourneview Park, Lurgan on 21 May 2021. Since Linfield had already qualified for Europe via their league position, the berth for the 2021–22 UEFA Europa Conference League first qualifying round was redistributed to the 3rd-placed 2020–21 NIFL Premiership team.