| League history: | North American Soccer League |
| Previous season: | 1972 North American Soccer League |
| Next season: | 1974 North American Soccer League |
Final League Tables
| Eastern Division | Gpd | W | T | L | For | Ag | Pts |
| Philadelphia Atoms | 19 | 9 | 8 | 2 | 29 | 14 | 104 |
| New York Cosmos | 19 | 7 | 7 | 5 | 31 | 23 | 91 |
| Miami Toros | 19 | 8 | 6 | 5 | 26 | 21 | 88 |
| Northern Division | Gpd | W | T | L | For | Ag | Pts |
| Toronto Metros | 19 | 6 | 9 | 4 | 32 | 18 | 89 |
| Montreal Olympique | 19 | 5 | 4 | 10 | 25 | 32 | 64 |
| Rochester Lancers | 19 | 4 | 6 | 9 | 17 | 27 | 59 |
| Southern Division | Gpd | W | T | L | For | Ag | Pts |
| Dallas Tornado | 19 | 11 | 4 | 4 | 36 | 25 | 111 |
| St Louis Stars | 19 | 7 | 5 | 7 | 27 | 27 | 82 |
| Atlanta Chiefs | 19 | 3 | 7 | 9 | 23 | 40 | 62 |
Play-offs Semi-finals
August 15, 1973 Dallas
Dallas Tornado 1, New York Cosmos 0
August 18, 1973 Philadelphia
Philadelphia Atoms 3, Toronto Metros 0
Championship Game
August 25, 1973 Dallas
Dallas Tornado 0, Philadelphia Atoms 2