| Sergio Ottolina | |
| Nationality: | Italian |
| Sport: | Athletics |
| Event: | Sprint |
| Club: | C.S. Esercito |
| Coach: | Peppino Russo |
| Birth Date: | 1942 11, df=yes |
| Birth Place: | Lentate sul Seveso, Italy |
| Retired: | 1972 |
| Height: | 1.74 m |
| Weight: | 68kg (150lb) |
| Pb: |
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| Country: |  Italy |
Sergio Ottolina (23 November 1942 – 28 April 2023) was an Italian sprinter. He won a bronze medal in the 200 m at the 1962 European Athletics Championships and a silver medal in the sprint medley relay at the 1966 European Indoor Games.
On 24 June 1964, he set a European record in the 200 m at 20.4 seconds that stood for three years. He competed at the 1964 and 1968 Summer Olympics in five individual and team sprint events in total, with the best achievements of seventh place in the 4 × 100 m relay (1964 and 1968) and in the 4 × 400 m relay (1968). Ottolina retired from competitions shortly before the 1972 Games due to a motorcycle accident.
Ottolina died on 28 April 2023, at the age of 80.[1]
| 1962 | European Championships | Belgrade, Yugoslavia | 3rd | 200 metres | 20.8 | |
| 1964 | Olympic Games | Tokyo, Japan | 8th | 200 metres | 20.9 | |
| 7th | 4×100 relay | 38.5 | ||||
| 1966 | European Indoor Games | Dortmund, West Germany | bgcolor=silver | 2nd | Medley relay | 3:22.2 |
| 1968 | Olympic Games | Mexico City, Mexico | 7th | 4×100 relay | 39.2 | |
| 7th | 4×400 relay | 3:04.6 |