The 1985 San Marino motorcycle Grand Prix was the final race of the 1985 Grand Prix motorcycle racing season. It took place on 30 August–1 September 1985 at the Circuito Internazionale Santa Monica.

Pos.	Rider	Team	Manufacturer	Time/Retired	Points
1	Eddie Lawson	Marlboro Team Agostini	Yamaha	47'34.440	15
2	Wayne Gardner	Rothmans Honda Britain	Honda	+17.520	12
3	Randy Mamola	Rothmans Honda Mamola	Honda	+21.610	10
4	Raymond Roche	Marlboro Team Agostini	Yamaha	+28.090	8
5	Ron Haslam	Rothmans Honda Britain	Honda	+1'03.350	6
6	Franco Uncini	HB Suzuki GP Team	Suzuki	+1'18.270	5
7	Gustav Reiner	Zwafink & Wilberts Racing	Honda	+1'19.140	4
8	Mike Baldwin		Honda	+1'20.220	3
9	Fabio Biliotti	Team Italia	Honda	+1 lap	2
10	Rob McElnea	Skoal Bandit Heron Suzuki	Suzuki	+1 lap	1
11	Sito Pons	HB Suzuki GP Team	Suzuki	+1 lap
12	Massimo Messere	Team Italia	Honda	+1 lap
13	Wolfgang Von Muralt	Frankonia-Suzuki	Suzuki	+1 lap
14	Dave Petersen	Kreepy Krauly Racing	Honda	+1 lap
15	Paul Lewis	Skoal Bandit Heron Suzuki	Suzuki	+1 lap
16	Leandro Beccheroni		Suzuki	+1 lap
17	Boet van Dulmen	Shell-Toshiba Racing Team	Honda	+1 lap
18	Eero Hyvärinen		Honda	+1 lap
19	Marco Papa		Suzuki	+2 laps
20	Andreas Leuthe		Honda	+2 laps
21	Andres Perez Rubio		Suzuki	+2 laps
22	Carlos Morante		Suzuki	+3 laps
23	Stelio Marmaras		Suzuki	+4 laps
24	Christian Sarron	Sonauto Gauloises Yamaha	Yamaha	Accident
Ret	Karl Truchsess		Honda	Retired
Ret	Dietmar Mayer		Honda	Retired
Ret	Marco Lucchinelli		Cagiva	Retired
Ret	Armando Errico	Team Italia	Honda	Retired
Ret	Rob Punt	Oud Bier	Suzuki	Retired
Ret	Thierry Espié		Chevallier	Retired
Ret	Virginio Ferrari	Cagiva	Retired
Ret	Didier de Radiguès	Honda Benelux Elf	Honda	Retired
Ret	Christian Le Liard	Team ROC	Honda	Retired
Sources: [2][3]