Sigfrido Fontanelli
| Personal information | |
|---|---|
| Born | 1 October 1947 Montelupo Fiorentino, Italy |
| Died | 20 February 2004 (aged 56) Lastra a Signa, Italy |
| Team information | |
| Role | Rider |
Sigfrido Fontanelli (1 October 1947 – 20 February 2004) was an Italian racing cyclist. He won stage 12 of the 1976 Giro d'Italia.