1955 Formula 1 Season 
Constructors
The Constructors Championship did not begin until 1958.| Teams | Constructor | Engine | Chassis |
|---|---|---|---|
 Connaught Engineering Rob Walker Racing Team Leslie Marr | Connaught | Alta GP 2.5 L4 | B-Type |
| Cooper Car Company | Cooper | Bristol BS1 2.0 L6 | T40 |
 Scuderia Ferrari Ecurie Belge | Ferrari | Ferrari 625 2.5 L4 | 500 F2 625 555 Lancia D50 |
 Equipe Simca-Gordini | Gordini | Gordini 23 2.5 L6 | T16 |
| Scuderia Lancia | Lancia | Lancia DS50 2.5 V8 | D50 |
| Officine Alfieri Maserati Alberto Uria Ecurie Rosier Stirling Moss Ltd Goulds Garage Owen Racing Organisation Gilby Engineering | Maserati | Maserati 250F1 2.5 L6 | 250F A6GCM |
 Daimler-Benz | Mercedes-Benz | Mercedes M196 2.5 L8 | W196 R Streamliner |
| Vandervell Products | Vanwall | Vanwall 254 2.5 L4 | VW 55 |
| Edward N. 'Ted' Whiteaway | HWM | Alta GP 2.5 L4 | 53 |
| Scuderia Achille Varzi | Arzani-Volpini | Maserati 4CLT 2.5 L4 | F1 |
| Race | Circuit | Date | Winning Driver | Constructor |
|---|---|---|---|---|
 Argentine Grand Prix | Oscar Gálvez | Jan 1955 | Juan Manuel 'El Chueco' Fangio | Mercedes-Benz |
 Monaco Grand Prix  | Monaco | May 1955 | Maurice Bienvenu Jean Paul Trintignant | Ferrari |
 Indianapolis 500 | Indianapolis | May 1955 | Kurtis | |
| Belgian Grand Prix | Spa-Francorchamps | Jun 1955 | Juan Manuel 'El Chueco' Fangio | Mercedes-Benz |
 Dutch Grand Prix | Zandvoort | Jun 1955 | Juan Manuel 'El Chueco' Fangio | Mercedes-Benz |
| British Grand Prix | Aintree | Jul 1955 | Sir Stirling Moss | Mercedes-Benz |
| Italian Grand Prix | Monza | Sep 1955 | Juan Manuel 'El Chueco' Fangio | Mercedes-Benz |
C
Race cancelled
DNA
Did not arrive
DNP
Did not practice
DNPQ
Did not pre-qualify
DNQ
Did not qualify
DNS
Did not start
DSQ
Disqualified
EX
Excluded
NC
Non-classified finish
PO
Practiced only
Ret
Did not finish
SHR
Shared Result
TD
Friday test driver
WD
Withdrew entry before the event