2021 League of Ireland Premier Division
| Season | 2021 |
|---|---|
| Dates | 19 March – 19 November 2021 |
| Champions | Shamrock Rovers (19th title) |
| Relegated | Longford Town F.C., Waterford |
| Champions League | Shamrock Rovers |
| Europa Conference League | St Patrick's Athletic Sligo Rovers Derry City |
| Matches played | 180 |
| Goals scored | 458 (2.54 per match) |
| Top goalscorer | Georgie Kelly (21 goals) |
| Biggest home win | Bohemians 5–0 Drogheda United (18 June 2021), Finn Harps 5-0 Longford Town (19 November 2021) |
| Biggest away win | Waterford 0–7 Drogheda United (8 May 2021) |
| Highest scoring | Waterford 0–7 Drogheda United (8 May 2021) |
| Longest winning run | Shamrock Rovers (7 games) |
| Longest unbeaten run | Shamrock Rovers (11 games) |
| Longest winless run | Longford Town (25 games) |
| Longest losing run | Waterford (7 games) Longford Town (7 games) |
| Highest attendance | 7,765 Shamrock Rovers 2-1 Drogheda United (19 November 2021) |
| Lowest attendance | 0 |
← 2020 2022 →
All statistics correct as of 20 November 2021. | |
The 2021 League of Ireland Premier Division, known as the SSE Airtricity League Premier Division for sponsorship reasons, was the 37th season of the League of Ireland Premier Division, the top Irish league for association football clubs since its establishment in 1985. Shamrock Rovers were the defending champions, having won their sixth league title the previous season. Shamrock Rovers went on to retain the title.