Riza Santos (born August 31, 1987) is a Filipino-Canadian beauty queen of Filipino and Spanish ancestry. Aside from being a beauty titlist, she is also being trained as a soldier in Canada. Her military career, according to her, had been influenced by her grandparents. She competed in the Miss Earth 2006 pageant where she bagged the Miss Photogenic award.

In her Pinoy Big Brother Celebrity Edition 2 stint, she played for Bantay Bata, ABS-CBN Foundation’s charitable institution. On Day 84, she was proclaimed the second place winner of Pinoy Big Brother Celebrity Edition 2.