The 1925 World Allround Speed Skating Championships took place on the 21st and 22 February 1925 at the ice rink Bislett Stadion in Oslo, Norway.

Roald Larsen was defending champion but did not succeed in prolonging his title.

Clas Thunberg became World champion for the second time.

The points were awarded to the skaters who had skated all the distances.

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