| Campbell Johnstone | |
| Birth Name: | Campbell Robert Johnstone |
| Birth Date: | 1980 1, df=yes |
| Birth Place: | Waipukurau, New Zealand |
| Height: | 1.830NaN0 |
| Weight: | 1100NaN0 |
| Position: | Prop |
| Years1: | 2009–2012 |
| Years2: | 2012 |
| Years3: | 2013 |
| Years4: | 2014 |
| Clubs4: | CSM București |
| Apps1: | 105 |
| Apps2: | 5 |
| Apps3: | 9 |
| Points1: | 0 |
| Points2: | 0 |
| Points3: | 5 |
| Superyears1: | 2004–2008 |
| Super1: | Crusaders |
| Superapps1: | 38 |
| Superpoints1: | 10 |
| Provinceyears1: | 2002–2008 |
| Provinceyears2: | 2012 |
| Province2: | Tasman |
| Provinceapps1: | 72 |
| Provinceapps2: | 7 |
| Provincepoints1: | 35 |
| Provincepoints2: | 5 |
| Repyears1: | 2005 |
| Repteam1: | New Zealand |
| Repcaps1: | 3 |
| Reppoints1: | 0 |
| School: | Lindisfarne College |
Campbell Robert Johnstone (born 7 January 1980) is a former New Zealand international rugby union player who played for Biarritz Olympique in the Top 14. In December 2012 he joined Welsh regional team Ospreys until the end of the 2012/13 season, going straight into their 38-man Heineken Cup squad and making his debut the same week against Toulouse.
He played for the All Blacks in 2005 in which he played three tests and made his debut against Fiji and his last test was against the British and Irish Lions. His position was prop.
On 30 January 2023, Johnstone revealed in an interview with Hilary Barry on New Zealand television show Seven Sharp that he is gay, making him the first openly gay All Black.[1]