1984–85 Eerste Divisie
The Dutch Eerste Divisie in the 1984–85 season was contested by 18 teams, one more than in the previous season. This was due to RKC Waalwijk entering from the amateurs. SC Heracles won the championship.
New entrants
Entered from amateur footballRelegated from the 1983–84 Eredivisie
Promotion competition
In the promotion competition, four period winners played for promotion to the Eredivisie.Attendances
| # | Club | Average |
| 1 | Heerenveen | 6,747 |
| 2 | VVV | 6,024 |
| 3 | Cambuur | 4,800 |
| 4 | Den Haag | 4,247 |
| 5 | Heracles | 3,941 |
| 6 | RKC | 3,644 |
| 7 | De Graafschap | 3,624 |
| 8 | Willem II | 3,400 |
| 9 | RBC | 3,079 |
| 10 | Veendam | 2,794 |
| 11 | Helmond | 2,556 |
| 12 | NEC | 2,447 |
| 13 | Wageningen | 2,371 |
| 14 | Vitesse | 2,356 |
| 15 | Eindhoven | 1,674 |
| 16 | SVV | 1,550 |
| 17 | Telstar | 1,259 |
| 18 | DS '79 | 1,144 |
Source: