|- align="center" |align="left"| Robert O'Brien |1952 |0 |1 |1 |0 |0 |0 |0 |0 |- align="center" |align="left"| Esteban Ocon |- |0 |50 |50 |0 |0 |0 |0 |136 |- align="center" |align="left"| Pat O'Connor |1954-1958 |0 |6Tekmoval samo v tekmah Indianapolis 500, ki so bile vključene v Velike nagrade svetovnega prvenstva F1 od sezone 1950 do sezone 1960. |5 |1 |0 |0 |0 |0 |- align="center" |align="left"| Casimiro de Oliveira |1958 |0 |1Nikoli ni štartal na dirki Formule 1. |0 |0 |0 |0 |0 |0 |- align="center" |align="left"| Jackie Oliver |1968-1973, 1977 |0 |51 |50 |0 |0 |2 |1 |13 |- align="center" |align="left"| Danny Ongais |1977-1978 |0 |6 |4 |0 |0 |0 |0 |0 |- align="center" |align="left"| Rikky von Opel |1973-1974 |0 |14 |10 |0 |0 |0 |0 |0 |- align="center" |align="left"| Karl Oppitzhauser |1976 |0 |1Oppitzhauser je bil na Veliki nagradi Avstrije 1976, vendar zaradi pomankanja dirkaških izkušenj ni dobil potrebnega dovoljenja za prosti trening. |0 |0 |0 |0 |0 |0 |- align="center" |align="left"| Fritz d'Orey |1959 |0 |3 |3 |0 |0 |0 |0 |0 |- align="center" |align="left"| Arthur Owen |1960 |0 |1 |1 |0 |0 |0 |0 |0
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