| Competition: | Irish League |
| Season: | 1948–49 |
| Winners: | Linfield 19th Irish title |
| Matches: | 132 |
| Total Goals: | 536 |
| League Topscorer: | Billy Simpson (19) |
| Prevseason: | 1947–48 |
| Nextseason: | 1949–50 |
The 1948–49 Irish League was the 48th edition of the Irish League, the highest level of league competition in Northern Irish football. The league comprised 12 teams, and Linfield won the championship.