| Competition: | Peruvian Primera División |
| Season: | 1942 |
| Dates: | 8 November 1942 – 2 May 1943 |
| Winners: | Sport Boys |
| Relegated: | Telmo Carbajo Santiago Barranco |
| Prevseason: | 1941 |
| Nextseason: | 1943 |
The 1942 season of the Peruvian Primera División, the top category of Peruvian football, was played by 10 teams. The national champions were Sport Boys. From 1931 until 1942 the points system was W:3, D:2, L:1, walkover:0.
Teams play each other once, either home or away. All matches were played at the Estadio Nacional, Lima.