1991 Italian motorcycle Grand Prix

  1991 Italian Grand Prix

Race details
Race 5 of 15 races in the 1991 Grand Prix motorcycle racing season
Date	19 May 1991
Official name	Gran Premio d'Italia[1]
Location	Circuito Internazionale Santa Monica
Course	Permanent racing facility 3.488 km (2.167 mi)
500cc
Pole position Rider Wayne Rainey Yamaha Time 1:16.191 Fastest lap Rider Wayne Rainey Yamaha Time 1:15.892 Podium First Mick Doohan Honda Second John Kocinski Yamaha Third Eddie Lawson Cagiva
250cc
Pole position Rider Helmut Bradl Honda Time 1:18.679 Fastest lap Rider Luca Cadalora Honda Time 1:17.965 Podium First Luca Cadalora Honda Second Helmut Bradl Honda Third Pierfrancesco Chili Aprilia
125cc
Pole position Rider Fausto Gresini Honda Time 1:24.267 Fastest lap Rider Fausto Gresini Honda Time 1:23.436 Podium First Fausto Gresini Honda Second Loris Capirossi Honda Third Alessandro Gramigni Aprilia
Sidecar (B2A)
Pole position Rider Rolf Biland LCR-ADM Time 1:19.127 Fastest lap Rider Steve Webster Krauser Time 1:20.039 Podium First Steve Webster Krauser Second Egbert Streuer LCR-Yamaha Third Paul Güdel LCR-Krauser

The 1991 Italian motorcycle Grand Prix was the fifth race of the 1991 Grand Prix motorcycle racing season. It took place on the weekend of 17–19 May 1991 at the Circuito Internazionale Santa Monica.