"The journey has been full of memorable moments, successes, joy and laughter, but there have also been many failures, tears and disappointments over the years," she writes.
Pärmäkoski has won five Olympic medals, two silver and three bronze, as well as seven World Championship medals. This season will be her 18th and final.
It has also been previously announced that American Jessie Diggins will retire after the season.
Correction: The wrong age was previously stated. Pärmäkoski is 34 years old.
