Kompletní výsledky závodníků GP 250 ccm roku 1966. Mistrem světa se stal Mike Hailwood na motocyklu Honda, druhý byl Phil Read a třetí Jim Redman.
Celkové pořadí jezdců GP 250 ccm 1966
| Poz. | Jméno | Číslo | Národnost | Motocykl | Body | Vítězství |
| 1 |  Mike Hailwood |
United Kingdom | Honda | 56 | 10 | |
| 2 | Phil Read |
United Kingdom | Yamaha | 34 | 0 | |
| 3 |  Jim Redman |
Rhodesia | Honda | 20 | 0 | |
| 4 | Derek Woodman |
United Kingdom | MZ | 18 | 0 | |
| 5 | Stuart Graham |
United Kingdom | Honda | 15 | 0 | |
| 6 |  Heinz Rosner |
East Germany | MZ | 15 | 0 | |
| 7 |  Jack Findlay |
Australia | Bultaco | 14 | 0 | |
| 8 |  Frantisek Stastny |
Czechoslovakia | Jawa | 11 | 0 | |
| 9 |  Mike Duff |
Canada | Yamaha | 9 | 0 | |
| 10 |  Ginger Molloy |
New Zealand | Bultaco | 8 | 1 | |
| = |  Hiroshi Hasegawa |
Japan | Yamaha | 8 | 1 | |
| 12 |  Gyula Marsovsky |
Switzerland | Bultaco | 8 | 0 | |
| 13 | Bill Ivy |
United Kingdom | Yamaha | 5 | 0 | |
| 14 |  Renzo Pasolini |
Italy | Aermacchi | 4 | 0 | |
| = | Kevin Cass |
Australia | Bultaco | 4 | 0 | |
| = | Peter Inchley |
United Kingdom | Villiers | 4 | 0 | |
| = | Alberto Pagani |
Italy | Aermacchi | 4 | 0 | |
| = | Akiyasu Motohashi |
Japan | Yamaha | 4 | 0 | |
| 19 | Bruce Beale |
Rhodesia | Honda | 4 | 0 | |
| 20 |  Kent Andersson |
Sweden | Husqvarna | 4 | 0 | |
| 21 | Selwyn Griffiths |
United Kingdom | Royal Enfield | 3 | 0 | |
| 22 | Tommy Robb |
United Kingdom | Bultaco | 3 | 0 | |
| 23 | Chris Anderson |
United Kingdom | Yamaha | 2 | 0 | |
| = | Jim Curry |
United Kingdom | Honda | 2 | 0 | |
| 25 |  Günter Beer |
West Germany | Honda | 1 | 0 | |
| = |  Daniel Lhéraud |
France | Yamaha | 1 | 0 | |
| = | Len Atlee |
Australia | Cotton | 1 | 0 | |
| = | Bill Smith |
United Kingdom | Bultaco | 1 | 0 | |
| = | Giuseppe Visenzi |
Italy | Aermacchi | 1 | 0 |
- Zdroj https://en.wikipedia.org
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- kurzíva = nejrychlejší kolo závodu
- výsledek tučně = poleposition
- Ret = nedokončil závod (retired)
- NC = neklasifikován (non-classified)
- C = závod zrušen (cancelled)
- EX = vyloučen (excluded)
- DNS = nenastoupil do závodu (did not start)
- DSQ = diskvalifikován (disqualified)
- DNQ = nekvalifikoval se (did not qualified)
- DNP = nezúčastnil se (did not participate)
- WD = výsledek anulován (withdrew)
