The 2002 San Marino Grand Prix (formally the Gran Premio di San Marino 2002) was a Formula One motor race held before between 90,000 and 100,000 spectators on 14 April 2002 at the Autodromo Enzo e Dino Ferrari, Imola, Emilia-Romagna, Italy. It was the fourth round of the 2002 Formula One World Championship and the 22nd San Marino Grand Prix. Ferrari's Michael Schumacher won the 62-lap race from pole position. His teammate Rubens Barrichello finished in second and Williams's Ralf Schumacher was third.
Going into the event, Michael Schumacher led the World Drivers' Championship from Ralf Schumacher while Williams led Ferrari in the World Constructors' Championship. After setting the fastest lap time in the one-hour qualifying session, Michael Schumacher started the Grand Prix from pole position and led for the majority of the race to claim his third victory of the season and 56th of his career. Barrichello finished second, 17.907 seconds behind, with Ralf Schumacher third, another 1.808 seconds back.
The race result meant Michael Schumacher increased his lead in the World Drivers' Championship to 14 championship points ahead of Ralf Schumacher and 17 ahead of Williams's Juan Pablo Montoya. With thirteen races left in the season, Ferrari reclaimed the lead in the World Constructors' Championship, three championship points ahead of Williams.
Background
alt=Aerial view of the Autodromo Enzo e Dino Ferrari|thumb|The [[Imola Circuit|Autodromo Enzo e Dino Ferrari (pictured in 2010), where the Grand Prix was held]]
The 2002 San Marino Grand Prix was the fourth round of seventeen in the 2002 Formula One World Championship and took place on 14 April 2002 at the anti-clockwise Autodromo Enzo e Dino Ferrari in Imola, Emilia-Romagna in Northern Italy, away from the small principality of San Marino. It was the 22nd San Marino Grand Prix,
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Warm-up
On race morning, a half-hour warm-up session was held in cool and dry weather, during which drivers and teams shook down their race and spare cars and tested intermediate tyres before the race. Barrichello lapped fastest at 1:25.483. In positions two to ten were Michael Schumacher, Montoya, Heidfeld, Massa, Räikkönen, Coulthard, Villeneuve, Button and Bernoldi. Other than Michael Schumacher going into the gravel trap and Trulli suffering an engine failure late on, there were no major incidents during the session. The air temperature was between . and the track temperature was . Michael Schumacher maintained the race lead heading into the Tamburello chicane after the red lights went out. Behind him, Ralf Schumacher made a fast start to draw alongside the slow-starting Barrichello on the track's dirty side. He lined up his Ferrari for a straighter run and provided him with enough space. McNish pulled over onto the grass to retire after losing power in his car's transmission.
At the conclusion of the first lap, Michael Schumacher led Ralf Schumacher by 1.3 seconds. The problem reoccurred, and Sato pulled over onto the grass at the Villeneuve chicane, retiring from the race.
thumb|right|upright|[[Giancarlo Fisichella (pictured in 2008) was one of ten drivers to retire from the Grand Prix.]]
Heidfeld made the race's first pit stop on lap 17, The stop was complicated by a refuelling nozzle failure, which prevented fuel from entering his car and kept him stationary for 17.9 seconds.
Frentzen retired on the grass on lap 27 after losing fuel rail pressure unexpectedly. Salo retired to the Toyota garage two laps later after losing use of traction control and fourth gear. On lap 45, McLaren engineers instructed him to enter pit lane and drive into the garage to retire as a precaution. Irvine stopped his car on the next lap at the pit lane exit due to a driveshaft failure. Coulthard drove a low-grip McLaren, and despite a wing adjustment, he was the final points scorer in sixth, one lap down. Barrichello was relieved to finish a race and called it "one of my best weekends in terms of car set-up and car balance, because it's been a really wonderful car." Renault team principal Flavio Briatore told Button, "Great drive". Coulthard said McLaren struggled more than he had expected and felt he could extract more from his car. The result extended Michael Schumacher's World Drivers' Championship lead to 14 championship points over Ralf Schumacher. Montoya remained third with 17 championship points while Button stayed fourth with eight. Barrichello's second-place finish moved him into fifth.
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Championship standings after the race
;Drivers' Championship standings
{| class="wikitable" style="font-size: 85%;"
|-
! scope="col" |
! scope="col" |
! scope="col" | Driver
! scope="col" | Points
|-
| align="left"| 10px
| align="center"| 1
| Michael Schumacher
| align="left"| 34
|-
| align="left"| 10px
| align="center"| 2
| Ralf Schumacher
| align="left"| 20
|-
| align="left"| 10px
| align="center"| 3
| Juan Pablo Montoya
| align="left"| 17
|-
| align="left"| 10px
| align="center"| 4
| Jenson Button
| align="left"| 8
|-
| align="left"| 10px 14
| align="center"| 5
| Rubens Barrichello
| align="left"| 6
|-
!colspan=4|Sources:
|}
;Constructors' Championship standings
{|class="wikitable" style="font-size: 85%;"
|-
! scope="col" |
! scope="col" |
! scope="col" | Constructor
! scope="col" | Points
|-
| align="left"| 10px 1
| align="center"| 1
| Ferrari
| align="left"| 40
|-
| align="left"| 10px 1
| align="center"| 2
| Williams-BMW
| align="left"| 37
|-
| align="left"| 10px
| align="center"| 3
| McLaren-Mercedes
| align="left"| 9
|-
| align="left"| 10px
| align="center"| 4
| Renault
| align="left"| 8
|-
| align="left"| 10px
| align="center"| 5
| Jaguar-Cosworth
| align="left"| 3
|-
!colspan=4|Sources: