Waterloo Regional Police are investigating a two-vehicle collision on Thursday at the intersection of Columbia Street West and Phillip Street in Waterloo.
Police said the crash happened before 5 p.m. involving a Honda and Toyota.
The driver of the Toyota, an 88-year-old man, was not injured.
The passenger of the Toyota, a 90-year-old Waterloo woman, was sent to hospital with non-life threatening injuries.
The driver of the Honda, a 22-year-old woman, was not injured.
The investigation is ongoing.
Anyone with information is asked to contact police.