Kompletní výsledky závodníků GP 125 ccm roku 1966. Mistrem světa se stal Luigi Taveri na motocyklu Honda, druhý byl Bill Ivy a třetí Ralph Bryans.
Celkové pořadí jezdců GP 125 ccm 1966
| Poz. | Jméno | Číslo | Národnost | Motocykl | Body | Vítězství |
| 1 |  Luigi Taveri |
Switzerland | Honda | 46 | 5 | |
| 2 |  Bill Ivy |
United Kingdom | Yamaha | 40 | 4 | |
| 3 | Ralph Bryans |
United Kingdom | Honda | 32 | 0 | |
| 4 | Phil Read |
United Kingdom | Yamaha | 29 | 1 | |
| 5 |  Hugh Anderson |
New Zealand | Suzuki | 15 | 0 | |
| 6 |  Yoshimi Katayama |
Japan | Suzuki | 14 | 0 | |
| 7 | Frank Perris |
United Kingdom | Suzuki | 10 | 0 | |
| 8 | Akiyasu Motohashi |
Japan | Yamaha | 5 | 0 | |
| 9 |  Mike Duff |
Canada | Yamaha | 4 | 0 | |
| = | Mitsuo Itoh |
Japan | Suzuki | 4 | 0 | |
| 11 | Tommy Robb |
United Kingdom | Yamaha | 3 | 0 | |
| 12 |  Francesco Villa |
Italy | Montesa | 2 | 0 | |
| = |  Hans-Georg Anscheidt |
West Germany | Suzuki | 2 | 0 | |
| = | Peter Williams |
United Kingdom | EMC | 2 | 0 | |
| 15 |  José Medrano |
Spain | Bultaco | 1 | 0 | |
| = | Herbert Mann |
West Germany | MZ | 1 | 0 | |
| = | Mike Hailwood |
United Kingdom | Honda | 1 | 0 | |
| = |  Friedhelm Kohlar |
East Germany | MZ | 1 | 0 | |
| = | Hartmut Bischoff |
East Germany | MZ | 1 | 0 | |
| = | Walter Scheimann |
West Germany | Honda | 1 | 0 | |
| = | Yasuharu Yuzawa |
Japan | Yamaha | 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)
