| Country: | Argentina |
| Season: | 1931 |
| Prevseason: | 1930 |
| Nextseason: | 1932 |
1931 saw the creation of the "Liga Argentina de Football", by 18 breakaway members of the "Asociación Argentina de Football". The LAF was the first professional league in Argentine football, it was won by Boca Juniors. The Amateur championship continued in parallel: the eventual champions were Almagro.
| Position | Team | Points | Played | Won | Drawn | Lost | For | Against | Difference | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Boca Juniors | 50 | 34 | 22 | 6 | 6 | 85 | 49 | 36 | |
| 2 | San Lorenzo | 45 | 34 | 19 | 7 | 8 | 81 | 52 | 29 | |
| 3 | Estudiantes La Plata | 44 | 34 | 20 | 4 | 10 | 103 | 51 | 52 | |
| 4 | River Plate | 44 | 34 | 19 | 6 | 9 | 63 | 39 | 24 | |
| 5 | Racing Club | 43 | 34 | 19 | 5 | 10 | 81 | 51 | 30 | |
| 6 | Independiente | 43 | 34 | 18 | 7 | 9 | 69 | 60 | 9 | |
| 7 | Chacarita Juniors | 42 | 34 | 18 | 6 | 10 | 63 | 58 | 5 | |
| 8 | Huracán | 33 | 34 | 13 | 7 | 14 | 58 | 49 | 9 | |
| 9 | Vélez Sársfield | 33 | 34 | 13 | 7 | 14 | 63 | 68 | bgcolor="F3F3F3" | -5 |
| 10 | Ferro Carril Oeste | 32 | 34 | 12 | 8 | 14 | 60 | 74 | bgcolor="F3F3F3" | -14 |
| 11 | Argentinos Juniors | 31 | 34 | 12 | 7 | 15 | 49 | 61 | bgcolor="F3F3F3" | -12 |
| 12 | Gimnasia La Plata | 30 | 34 | 9 | 12 | 13 | 42 | 64 | bgcolor="F3F3F3" | -22 |
| 13 | Platense | 29 | 34 | 13 | 3 | 18 | 52 | 52 | 0 | |
| 14 | Quilmes | 29 | 34 | 12 | 5 | 17 | 53 | 62 | bgcolor="F3F3F3" | -9 |
| 15 | Talleres (RdE) | 24 | 34 | 11 | 2 | 21 | 48 | 68 | bgcolor="F3F3F3" | -20 |
| 16 | Tigre | 23 | 34 | 8 | 7 | 19 | 47 | 70 | bgcolor="F3F3F3" | -23 |
| 17 | Lanús | 22 | 34 | 10 | 2 | 22 | 43 | 84 | bgcolor="F3F3F3" | -39 |
| 18 | Atlanta | 15 | 34 | 4 | 7 | 23 | 33 | 83 | bgcolor="F3F3F3" | -50 |
| Position | Player | Team | Goals | |
|---|---|---|---|---|
| 1 | Alberto Zozaya | Estudiantes La Plata | 33 | |
| 2 | Alejandro Scopelli | Estudiantes La Plata | 31 | |
| 3 | Francisco Varallo | Boca Juniors | 27 | |
| 4 | Herminio Masantonio | Huracán | 23 | |
| 5 | Luis Sánchez | Platense | 20 |
No teams were relegated after the inaugural season.