| Horst Bleeker | |
| Strokes: | Freestyle, backstroke |
| Club: | Bremer Sport-Club |
| Birth Date: | 17 June 1938 |
| Birth Place: | Bremen, Germany |
Horst Bleeker (born 17 June 1938 – 6 October 2023) was a former competition swimmer from Germany. He represented the United Team of Germany at the 1956 Summer Olympics in the 100-metre freestyle and 4×200-metre freestyle relay and finished in fifth place in the relay.
He won three national titles: in the 100-metre (1959), 200-metre (1957) and 400-metre freestyle (1957).
Bleeker died on 6 October 2023, at the age of 85.[1]