| Harry Vermaas | |
| Birth Name: | Cornelis Hermanus Vermaas |
| Birth Date: | 23 January 1984 |
| Height: | 1.80NaN0 |
| Weight: | 108kg (238lb) |
| Occupation: | Professional rugby player |
| School: | Afrikaanse Hoër Seunskool |
| University: | University of Pretoria |
| Ru Currentteam: | USA Limoges |
| Ru Position: | Hooker |
| Ru Provinceyears: | 2005–06 2006–07 2007–10 2010–13 2014- |
| Ru Province: | Blue Bulls Leinster Boland AS Béziers USA Limoges |
| Ru Provincecaps: | 2 14 22 56 14 |
| Ru Provincepoints: | (0) (0) (0) (15) (5) |
Cornelis Hermanus "Harry" Vermaas (born 23 January 1984) is a South African rugby union rugbymen who currently plays for USA Limoges in the French domestic Fédérale 1 competition. He is a versatile front rower who is capable of playing either at prop or at hooker and has also represented Leinster, the Blue Bulls, Boland Cavaliers, Pumas and the Springboks' Under-21 team.