| Competition: | Ecuadorian Serie A |
| Season: | 1973 |
| Winners: | El Nacional |
| Continentalcup1: | Copa Libertadores |
| Continentalcup1 Qualifiers: | El Nacional Universidad Católica |
| Prevseason: | 1972 |
| Nextseason: | 1974 |
The 1973 Campeonato Ecuatoriano de Fútbol Serie A, the first division of Ecuadorian football (soccer), was played by 12 teams. The champion was El Nacional.[1]