| Sergio Realini | |
| Birth Date: | 24 June 1925 |
| Birth Place: | Gavirate, Italy |
| Death Place: | Treviso, Italy |
| Position: | Defender |
| Years1: | 1944–1945 |
| Years2: | 1945–1946 |
| Years3: | 1946–1947 |
| Years4: | 1947–1948 |
| Years5: | 1948–1949 |
| Years6: | 1949–1950 |
| Years7: | 1950–1955 |
| Years8: | 1955–1956 |
| Years9: | 1956–1958 |
| Clubs8: | Vittorio Veneto |
| Clubs9: | Pordenone |
| Caps1: | 9 |
| Caps2: | 22 |
| Caps3: | 10 |
| Caps5: | 39 |
| Caps6: | 10 |
| Caps7: | 152 |
| Caps9: | 37 |
| Goals1: | 0 |
| Goals2: | 0 |
| Goals3: | 0 |
| Goals5: | 0 |
| Goals6: | 0 |
| Goals7: | 0 |
| Goals9: | 0 |
Sergio Realini (June 24, 1925 – December 20, 1990) was an Italian professional football player.