| Birth Date: | 5 September 1923 |
| Birth Place: | Gennep, the Netherlands |
| Death Place: | Nijmegen, the Netherlands |
| Sport: | Cycling |
| Show-Medals: | yes |
Theodorus Petrus "Theo" Blankenaauw (also Blankenauw, 5 September 1923 - 28 August 2011) was a Dutch track cyclist. He competed at the 1948 Summer Olympics in the 1 km time trial and the 4 km team pursuit and finished in 12th place in the time trial.