| Name | Gender | Appearances | Top Performance |
|---|---|---|---|
| Samalulu Clifton | Female | 5 | 2nd |
| Tuva'a Clifton | Male | 8 | 2nd |
| David Clough | Male | 18 | 8th |
| Jason Clough | Male | 1 | 140th |
| Matthew Clough | Male | 4 | 8th |
| Ryan Clough | Male | 8 | 1st |
| Richard Coachman | Male | 1 | 15th |
| Euan Coates | Male | 2 | 30th |
| Andrew Cochrane | Male | 1 | 3rd |
| Dean Cochrane | Male | 2 | 2nd |
| Mark Cockroft | Male | 2 | 13th |
| Piero Codevilla | Male | 1 | 127th |
| Cathal Codyre | Male | 3 | 9th |
| Mark Coffey | Male | 1 | 40th |
| Nathan Cohen | Male | 1 | 13th |
| Alison Cole | Female | 4 | 15th |
| Ivan Cole | Male | 12 | 15th |
| Rebecca Cole | Female | 23 | 3rd |
| Ron Cole | Male | 21 | 5th |
| Thomas Cole | Male | 7 | 1st |
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