Kompletní výsledky závodníků GP 125 ccm roku 1991. Mistrem světa se stal Loris Capirossi na motocyklu Honda, druhý byl Fausto Gresini a třetí Ralf Waldmann.
Celkové pořadí jezdců GP 125 ccm 1991
| Poz. | Jméno | Číslo | Národnost | Motocykl | Body | Vítězství |
| 1 |  Loris Capirossi |
1 | Italy | Honda | 200 | 5 |
| 2 | Fausto Gresini |
8 | Italy | Honda | 181 | 2 |
| 3 |  Ralf Waldmann |
28 | Germany | Honda | 141 | 2 |
| 4 | Gabriele Debbia |
12 | Italy | Aprilia | 111 | 0 |
| 5 |  Noboru Ueda |
56 | Japan | Honda | 105 | 2 |
| 6 |  Jorge Martínez |
6 | Spain | Cobas | 99 | 0 |
| 7 | Alessandro Gramigni |
9 | Italy | Aprilia | 90 | 1 |
| 8 | Dirk Raudies |
5 | Germany | Honda | 81 | 0 |
| 9 | Peter Öttl |
22 | Germany | Rotax | 67 | 1 |
| 10 | Noboyuki Wakai |
51 | Japan | Honda | 60 | 0 |
| 11 |  Heinz Lüthi |
10 | Switzerland | Honda | 56 | 0 |
| 12 | Adi Stadler |
11 | Germany | Cobas | 56 | 0 |
| 13 | Kazuto Sakata |
35 | Japan | Honda | 55 | 0 |
| 14 |  Hans Spaan |
2 | Netherlands | Honda | 54 | 0 |
| 15 | Bruno Casanova |
3 | Italy | Honda | 45 | 0 |
| 16 | Ezio Gianola |
6 | Italy | Derbi | 32 | 0 |
| 17 | Koji Takada |
16 | Japan | Honda | 28 | 0 |
| 18 | Maurizio Vitali |
15 | Italy | Gazzaniga | 27 | 0 |
| 19 | Hisashi Unemoto |
Japan | Honda | 15 | 0 | |
| 20 | Kinya Wada |
73 | Japan | Honda | 14 | 0 |
| 21 | Masato Shima |
Japan | Honda | 13 | 0 | |
| 22 | Luis Alvaro |
66 | Spain | Derbi | 13 | 0 |
| 23 | Oliver Petrucciani |
47 | Switzerland | Aprilia | 13 | 0 |
| 24 | Herri Torrontegui |
Spain | Cobas | 12 | 0 | |
| 25 | Andres Sanchez |
Spain | Cobas | 12 | 0 | |
| 26 | Gimmi Bosio |
Italy | Honda | 12 | 0 | |
| 27 | Julián Miralles |
14 | Spain | Cobas | 10 | 0 |
| 28 | Alfred Waibel |
19 | Germany | Honda | 9 | 0 |
| 29 | Akira Saito |
Japan | Honda | 8 | 0 | |
| 30 | Sinya Sato |
Japan | Honda | 7 | 0 | |
| 31 | Carlos Giro Jr. |
Spain | Cobas | 7 | 0 | |
| 32 | Arie Molenaar |
46 | Netherlands | Honda | 7 | 0 |
| 33 | Manuel Herreros |
Spain | Cobas | 6 | 0 | |
| 34 |  Ian McConnachie |
62 | United Kingdom | Kawasaki | 5 | 0 |
| 35 | Steve Patrickson |
United Kingdom | Honda | 5 | 0 | |
| 36 |  Johnny Wickstroem |
Finland | Cobas | 5 | 0 | |
| 37 | Yosuke Yamakawa |
Japan | Honda | 3 | 0 | |
| 38 |  Peter Galvin |
29 | Australia | Honda | 2 | 0 |
| 39 |  Alain Bronec |
41 | France | Honda | 2 | 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)
