| Željko Knapić | |
| Birth Date: | 26 March 1957 |
| Religion: | Islam |
| Birth Place: | Čakovec, Yugoslavia[1] |
| Height: | 1.74 m |
| Weight: | 67 kg |
| Sport: | Athletics |
| Event: | 400 metres |
| Club: | AK Sloboda Varaždin |
Željko Knapić (born 26 March 1957 in Čakovec) is a retired Croatian sprinter who represented former Yugoslavia in the 400 metres. He competed at the 1980 Summer Olympics in the 4 × 400 metres relay without qualifying for the final. In addition, he won two medals at the Mediterranean Games. He still holds Croatian records in the 200 and 400 metres.
| Representing | ||||||
|---|---|---|---|---|---|---|
| 1975 | European Junior Championships | Athens, Greece | 5th | 400 m | 47.59 | |
| 8th | 4 × 400 m relay | 3:15.2 | ||||
| 1977 | Universiade | Sofia, Bulgaria | 10th (sf) | 400 m | 47.04 | |
| 4th | 4 × 400 m relay | 3:06.5 | ||||
| 1978 | European Indoor Championships | Milan, Italy | 4th | 400 m | 47.83 | |
| European Championships | Prague, Czechoslovakia | 18th (h) | 400 m | 47.51 | ||
| 8th | 4 × 400 m relay | 3:06.9 | ||||
| 1979 | European Indoor Championships | Vienna, Austria | 7th (sf) | 400 m | 47.72 | |
| Mediterranean Games | Split, Yugoslavia | 4th | 400 m | 46.42 | ||
| bgcolor=silver | 2nd | 4 × 400 m relay | 3:04.33 | |||
| 1980 | Olympic Games | Moscow, Soviet Union | 7th (h) | 4 × 400 m relay | 3:05.3 | |
| 1982 | European Indoor Championships | Milan, Italy | 4th | 400 m | 47.46 | |
| European Championships | Athens, Greece | 7th | 400 m | 46.20 | ||
| 10th (h) | 4 × 400 m relay | 3:08.44 | ||||
| 1983 | Mediterranean Games | Casablanca, Morocco | 3rd | 400 m | 45.95 | |
| 4th | 4 × 400 m relay | 3:07.00 | ||||
| 1986 | European Championships | Stuttgart, West Germany | 23rd (h) | 400 m | 47.81 | |
| 7th | 4 × 400 m relay | 3:05.27 | ||||
| 1987 | European Indoor Championships | Liévin, France | 18th (h) | 400 m | 48.54 | |
| 1988 | European Indoor Championships | Budapest, Hungary | 10th (sf) | 400 m | 47.56 | |
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