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.

[1] She competed in the individual eventing at the 2000 Summer Olympics.

[2] She would have also been at Athens but an injury to her horse prevented it.