| Competition: | Primera Fuerza |
| Season: | 1920–21 |
| Winners: | Liga Mexicana: Germania (1st title) Liga Nacional: Club España (7th title) |
| Prevseason: | 1919–20 |
| Nextseason: | 1921–22 |
Statistics of Primera Fuerza in season 1920–21.
Club España decided to form their own league called "Liga Nacional" playing alongside the official one (Liga Mexicana)
It was contested by 5 teams, and Club España won the championship. Tournament played at a single leg.
| Liga Nacional |
|---|
| Club España |
| America |
| Luz y Fuerza |
| Amicale Française |
| Reforma |
It was contested by 15 teams, and Germania won the championship.
| Liga Mexicana |
|---|
| Germania (Champion) |
| Asturias |
| Deportivo Internacional |
| México FC |
| Morelos |