The 1912 World Allround Speed Skating Championships took place at 17 and 18 February 1912 at the ice rink Gamle Frogner in Kristiania, Norway.

Nikolay Strunnikov was defending champion but did not take part in these championships.

Oscar Mathisen had the lowest number of points awarded and won all four distances.

He and Jaap Eden are the only ice-skaters winning the World championship three times (so far).

The final ranking was then decided by ordering the skaters by lowest point totals.