1920–21 Irish League
| Season | 1920–21 |
|---|---|
| Dates | 6 November 1920 – 9 May 1921 |
| Champions | Glentoran 6th Irish title |
| Matches played | 20 |
| Goals scored | 54 (2.7 per match) |
| Biggest home win | Glentoran 5–1 Distillery |
| Biggest away win | Distillery 0–3 Glentoran |
| Highest scoring | Glenavon 4–3 Distillery |
← 1919–20 1921–22 → | |
The 1920–21 Irish League was the 27th edition of the Irish League, the highest level of league competition in Irish football.
The league comprised five teams, and Glentoran won the championship for the 6th time.