FIS Nordic World Ski Championships 1978

The FIS Nordic World Ski Championships 1978 took place February 18–26, 1978 in Lahti, Finland. This was Lahti's record fourth time hosting the event after previously doing so in 1926, 1938, and 1958. The women's 20 km event was added.

15 km
February 21, 1978

30 km
February 19, 1978

50 km
February 26, 1978

4 × 10 km relay
February 23, 1978

5 km
February 20, 1978

10 km
February 18, 1978

20 km
February 25, 1978

4 × 5 km relay
February 22, 1978

Individual
February 19–20, 1978

Individual normal hill
February 18, 1978

Individual large hill
February 25, 1978

Team large hill (unofficial)
February 22, 1978. No medals awarded.