De Klassieker
| Other names | Ajax vs Feyenoord |
|---|---|
| Location | Netherlands |
| Teams | Ajax Feyenoord |
| First meeting | 9 October 1921 1ste Klasse Feyenoord 2–2 Ajax |
| Latest meeting | 14 December 2025 Eredivisie Ajax 2–0 Feyenoord |
| Next meeting | 21 March 2026 Eredivisie Feyenoord v Ajax |
| Statistics | |
| Meetings total | 208 |
| Most wins | Ajax (96) |
| Top scorer | Sjaak Swart (18) |
| Largest victory | Ajax 8–2 Feyenoord (18 September 1983) Feyenoord 6–0 Ajax (7 April 2024) |
De Klassieker (The Classic) is the main football rivalry of the Netherlands, between Ajax (of Amsterdam) and Feyenoord (of Rotterdam), two of the traditional Big Three football teams from the Netherlands. The record attendance was on 9 January 1966, when 65,562 watched in Rotterdam.