The 2021 FAI Cup Final, known as the 2021 Extra.ie FAI Cup Final for sponsorship reasons, was the final match of the 2021 FAI Cup, the national association football cup of the Republic of Ireland. The match took place on Sunday 28 November at the Aviva Stadium in Dublin, and was contested by St Patrick's Athletic and Bohemians. St Patrick's Athletic captained by Ian Bermingham won the game 4–3 on penalties after a 1–1 draw in which both Chris Forrester and Rory Feely scored against their former clubs.

Aviva Stadium also known as Lansdowne Road or Dublin Arena is a sports stadium located in Dublin, Ireland, with a capacity for 51,711 spectators. It is built on the site of the former Lansdowne Road Stadium, which was demolished in 2007, and replaced it as home to its chief tenants: the Irish rugby union team and the Republic of Ireland football team. The decision to redevelop the stadium came after plans for both Stadium Ireland and Eircom Park fell through. Aviva Group Ireland signed a 10-year deal for the naming rights in 2009, and subsequently extended the arrangement until 2025.