President Mauno Koivisto's private archive is preserved at the National Archives of Finland. The size of the collection is almost 32 shelf metres, containing a wide range of information regarding him and his life.

A good example of the wide scope of the private archive can be seen in the collection of photographs contained within (25 containers in total). The collection contains photos at least from the years 1939 to 1998, and includes prints by professional photographers as well as photos possibly taken by president Koivisto himself. Sadly, the photographer, time and place are seldom mentioned. The collection presented here contains photos from his youth.