| Guus Haak | |
| Fullname: | Augustinus Wilhelmus Haak[1] |
| Birth Date: | 17 April 1937 |
| Birth Place: | The Hague, Netherlands |
| Position: | Defender |
| Youthyears1: | 1952–1956 |
| Youthclubs1: | VCS Den Haag |
| Years1: | 1956–1963 |
| Years2: | 1963–1970 |
| Years3: | 1970–1971 |
| Clubs1: | ADO |
| Clubs2: | Feijenoord |
| Clubs3: | Holland Sport |
| Caps1: | 136 |
| Caps2: | 164 |
| Caps3: | 6 |
| Goals1: | 17 |
| Goals2: | 16 |
| Goals3: | 0 |
| Totalcaps: | 306 |
| Totalgoals: | 33 |
| Nationalyears1: | 1962–1965 |
| Nationalteam1: | Netherlands |
| Nationalcaps1: | 14 |
| Nationalgoals1: | 0 |
Augustinus Wilhelmus "Guus" Haak (born 17 April 1937) is a Dutch former footballer who played for Feyenoord and was part of their European Cup victory in 1970. He earned 14 caps for the Netherlands national football team. https://web.archive.org/web/20070220004041/http://www.voetbalstats.nl/nedxi/sp176.html