| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Female | |
| Full name | Marianne Yvonne•Heemskerk (-Oudkerk-) | |
| Used name | Marianne•Heemskerk | |
| Born | 28 August 1944 in Rotterdam, Zuid-Holland | |
| Measurements | 152 cm / 55 kg | |
| Affiliations | ZV Naarden — Naarden, Noord-Holland | |
| NOC | Netherlands |
| Medals | OG |
| Gold | 0 |
| Silver | 1 |
| Bronze | 0 |
| Total | 1 |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1960 Summer Olympics | Swimming (Aquatics) | Marianne Heemskerk | ||||
| 100 metres Butterfly, Women (Olympic) | 2 | Silver | ||||
| 4 × 100 metres Medley Relay, Women (Olympic) | Netherlands | 4 | ||||
| 1964 Summer Olympics | Swimming (Aquatics) | Marianne Heemskerk | ||||
| 400 metres Individual Medley, Women (Olympic) | 10 |