| Ubaldo Passalacqua | |
| Birth Date: | 29 May 1918 |
| Birth Place: | Rapolano, Italy |
| Position: | Defender |
| Years1: | 1936–1942 |
| Years2: | 1942–1949 |
| Years3: | 1949–1950 |
| Years4: | 1950–1951 |
| Clubs1: | Siena |
| Clubs2: | Internazionale |
| Clubs3: | Pavia |
| Clubs4: | Lecco |
| Caps1: | 186 |
| Caps2: | 155 |
| Caps3: | 35 |
| Caps4: | 12 |
| Goals1: | 0 |
| Goals2: | 0 |
| Goals3: | 0 |
| Goals4: | 0 |
Ubaldo Passalacqua (born 29 May 1918 in Rapolano Terme) was an Italian professional football player who played as a defender.