| Kay Thomassen | |
| Fullname: | Kay Thomassen |
| Birth Date: | 6 March 1987 |
| Birth Place: | Nijmegen, Netherlands |
| Position: | Right-back |
| Youthclubs1: | VV Ewijk |
| Youthyears2: | 1999–2006 |
| Youthclubs2: | Quick 1888 |
| Years1: | 2006–2009 |
| Caps1: | ? |
| Goals1: | 6 |
| Clubs1: | Quick 1888 |
| Years2: | 2009–2011 |
| Caps2: | ? |
| Goals2: | 7 |
| Clubs2: | Juliana '31 |
| Years3: | 2011–2013 |
| Caps3: | ? |
| Goals3: | ? |
| Clubs3: | Quick 1888 |
| Years4: | 2011–2014 |
| Caps4: | 10 |
| Goals4: | 0 |
| Clubs4: | Achilles '29 |
| Years5: | 2014–2018 |
| Caps5: | ? |
| Goals5: | ? |
| Clubs5: | Quick 1888 |
Kay Thomassen (born 3 June 1987) is a Dutch former footballer who played as a right-back.[1]
He most notably had a stint at Achilles '29 in the Dutch Eerste Divisie in the 2013–14 season.[2] He also played first team football for Quick 1888 and Juliana '31.