| Season: | 1965–66 |
| Winners: | AFC Ajax (11th title) |
| League Topscorer: |  Willy van der Kuijlen (PSV Eindhoven); Piet Kruiver (Feijenoord) - 23 goals [1] |
| Total Goals: | 779 |
| Average Goals: | 3.24 |
| Nextseason: | 1966–67 |
The Dutch Eredivisie in the 1965–66 season was contested by 16 teams. Ajax won the championship. Only one team was relegated this season, because in the next, the number of participants would be 18 again.
A total of 16 teams are taking part in the league.