Kompletní výsledky závodníků GP 350 ccm roku 1966. Mistrem světa se stal Mike Hailwood na motocyklu Honda, druhý byl Giacomo Agostini a třetí Renzo Pasolini.
Celkové pořadí jezdců GP 350 ccm 1966
| Poz. | Jméno | Číslo | Národnost | Motocykl | Body | Vítězství |
| 1 |  Mike Hailwood |
United Kingdom | Honda | 48 | 6 | |
| 2 |  Giacomo Agostini |
Italy | MV Agusta | 42 | 3 | |
| 3 | Renzo Pasolini |
Italy | Aermacchi | 17 | 0 | |
| 4 |  Frantisek Stastny |
Czechoslovakia | Jawa | 13 | 0 | |
| 5 | Gustav Havel |
Czechoslovakia | Jawa | 12 | 0 | |
| 6 | Alberto Pagani |
Italy | Aermacchi | 11 | 0 | |
| 7 |  Heinz Rosner |
East Germany | MZ | 10 | 0 | |
| 8 | Phil Read |
United Kingdom | Yamaha | 8 | 1 | |
| 9 |  Jack Ahearn |
Australia | Norton | 8 | 0 | |
| 10 |  Bruce Beale |
Rhodesia | Honda | 7 | 0 | |
| 11 | Tarquinio Provini |
Italy | Benelli | 6 | 0 | |
| = | Peter Williams |
United Kingdom | AJS | 6 | 0 | |
| = | Bill Ivy |
United Kingdom | Yamaha | 6 | 0 | |
| 14 | Silvio Grassetti |
Italy | Bianchi | 6 | 0 | |
| 15 | Jim Redman |
Rhodesia | Honda | 4 | 0 | |
| = | Tommy Robb |
United Kingdom | Bultaco | 4 | 0 | |
| = | Chris Conn |
United Kingdom | Norton | 4 | 0 | |
| 18 | Gilberto Milani |
Italy | Aermacchi | 3 | 0 | |
| = | Stuart Graham |
United Kingdom | AJS | 3 | 0 | |
| = | Kel Carruthers |
Australia | Norton | 3 | 0 | |
| = | Byron Black |
United Kingdom | Honda | 3 | 0 | |
| 22 | Frantisek Bocek |
Czechoslovakia | Jawa | 3 | 0 | |
| 23 | Dave Simmonds |
United Kingdom | Honda-Norton | 2 | 0 | |
| = |  Kenzo Muromachi |
Japan | Honda | 2 | 0 | |
| 25 | John Blanchard |
United Kingdom | AJS | 1 | 0 | |
| = | Joe Dunphy |
United Kingdom | Norton | 1 | 0 | |
| = |  Kent Andersson |
Sweden | Husqvarna | 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)
