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.Men's cross-country
15 km
February 21, 1978
| Medal | Athlete | Time |
| Gold | | 49:09.37 |
| Silver | | 49:11.62 |
| Bronze | | 49:14.37 |
30 km
February 19, 1978
| Medal | Athlete | Time |
| Gold | | 1:32:56.00 |
| Silver | | 1:33:48.23 |
| Bronze | | 1:33:52.21 |
50 km
February 26, 1978
| Medal | Athlete | Time |
| Gold | | 2:46:43.06 |
| Silver | | 2:47:34.48 |
| Bronze | | 2:47:52.27 |
February 23, 1978
| Medal | Team | Time |
| Gold | | 2:05:17.63 |
| Silver | | 2:05:28.95 |
| Bronze | | 2:06:48.37 |
Women's cross-country
February 20, 1978
| Medal | Athlete | Time |
| Gold | | 18:53.50 |
| Silver | | 18:58.49 |
| Bronze | | 19:01.30 |
10 km
February 18, 1978
| Medal | Athlete | Time |
| Gold | | 37:01.72 |
| Silver | | 37:13.37 |
| Bronze | | 37:23.43 |
20 km
February 25, 1978
| Medal | Athlete | Time |
| Gold | | 1:13:00.85 |
| Silver | | 1:13:08.11 |
| Bronze | | 1:13:57.95 |
4 × 5 km relay
February 22, 1978
| Medal | Team | Time |
| Gold | | 1:13:25.08 |
| Silver | | 1:13:29.74 |
| Bronze | | 1:13:39.88 |
Individual
February 19–20, 1978
| Medal | Athlete | Points |
| Gold | | 435.24 |
| Silver | | 431.66 |
| Bronze | | 430.83 |
February 18, 1978
| Medal | Athlete | Points |
| Gold | | 253.2 |
| Silver | | 251.7 |
| Bronze | | 250.0 |
February 25, 1978
| Medal | Athlete | Points |
| Gold | | 256.6 |
| Silver | | 256.3 |
| Bronze | | 255.8 |
Team large hill (unofficial)
February 22, 1978. No medals awarded.
| Rank | Team | Points |
| 1 | | 443.8 |
| 2 | | 401.0 |
| 3 | | 396.6 |
Medal table
