| Ervin Katnić | |
| Birth Date: | 1921 9, df=yes |
| Birth Place: | Pula, Kingdom of Yugoslavia |
| Death Place: | Split, SR Croatia, SFR Yugoslavia |
| Position: | Midfielder |
| Years1: | 1939-1941 |
| Clubs1: | Grion Pola |
| Years2: | 1944–1952 |
| Clubs2: | Hajduk Split |
| Caps2: | 106 |
| Goals2: | 0 |
Ervin Katnić (2 September 1921 – 4 January 1979) was a Yugoslav football midfielder who was a member of the Yugoslavia national team at the 1950 FIFA World Cup.[1] However, he never earned a cap for his country. He also played for Hajduk Split.[2]