Piia Pantsu (born March 29, 1971 in Varkaus, Finland) is a Finnish equestrian rider.
She competes in three-day eventing and in show jumping competitions.
She is married to Fredrik Jönsson who was the son of her trainer, Jan Jönsson.Although she never achieved a medal she is remembered as a sole Finnish equestrian at the Olympics.
She would have been at Athens but an injury to her horse prevented it.