| Luigi Ossoinach | |
| Birth Date: | 24 February 1899 |
| Birth Place: | Fiume, Austria-Hungary (now Rijeka, Croatia) |
| Position: | Striker |
| Years1: | 1919–1926 |
| Years2: | 1926–1927 |
| Years3: | 1927–1929 |
| Years4: | 1929–1930 |
| Years5: | 1930–1932 |
| Years6: | 1932–1933 |
| Clubs6: | Fiumana |
| Caps1: | 92 |
| Caps2: | 11 |
| Caps3: | 37 |
| Caps4: | 8 |
| Caps5: | 45 |
| Caps6: | 7 |
| Goals1: | 57 |
| Goals2: | 2 |
| Goals3: | 8 |
| Goals4: | 3 |
| Goals5: | 13 |
| Goals6: | 2 |
Luigi Ossoinach, last name also spelled Ossoinak (born 24 February 1899 in Fiume, Austria-Hungary, now Rijeka, Croatia; died 4 May 1990) was an Italian professional footballer who played as a striker.
He played 8 games, scoring 3 goals during the 1929–30 season in the Serie A for A.S. Roma.