| Birth Date: | day=31 month=7 year=1987 |
| Birth Place: | Manchester, Greater Manchester, England |
| Height: | 178 cm |
| Weight: | 64 kg |
| Sport: | Athletics |
| Event: | 5000 m, steeplechase |
| Pb: | 3000 mS – 8:22.42 (2016) 5000 m – 14:25.90 (2016) |
| Show-Medals: | yes |
Rob Mullett (born 31 July 1987) is a British steeplechase runner. He competed at the 2016 Summer Olympics in the 3000 metres steeplechase event, but failed to reach the final.
Mullett grew up in Sussex and competed for Lewes Athletics club. He completed his undergraduate studies at St Mary's University, Twickenham and after graduating from there, earned a scholarship at Butler University in Indianapolis, Indiana, where he earned a Master's in Education, Teaching and Leadership. At Butler, Mullett became the first sub-four-minute miler in school history and holds the school record in the mile.
Mullett now lives in Atlanta, Georgia, where he trains with Atlanta Track Club Elite and competes in road races for prize money.