FIS Nordic World Ski Championships 1978
The 1978 FIS Nordic World Ski Championships took place 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 20km event was added.
Men's cross country
15 km
| Medal | Athlete | Time |
| Gold |  Josef Łuszczek, Poland
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| Silver |  Yevgeniy Belyayev, USSR
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| Bronze |  Juha Mieto, Finland
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30 km
| Medal | Athlete | Time |
| Gold | Sergey Savelyev, USSR
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| Silver | Nikolay Zimyatov, USSR
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| Bronze | Josef Łuszczek, Poland
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50 km
| Medal | Athlete | Time |
| Gold |  Sven-Åke Lundback, Sweden
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| Silver | Yevgeniy Belyayev, USSR
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| Bronze |  Jean-Paul Perrat, France
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4 x 10 km relay
| Medal | Athlete | Time |
|---|---|---|
| Gold | Sweden (Sven-Åke Lundbäck, Christer Johansson, Tommy Linnby, Thomas Magnusson)
| |
| Silver | Finland (Esko Lähtevänoja, Juha Mieto, Pertti Teurajärvi, Martti Pitkänen)
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| Bronze |  Norway (Lars-Erik Eriksen, Ove Aunli, Ivar Formo, Oddvar Brå)
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Women's cross country
5 km
| Medal | Athlete | Time |
| Gold | Helena Takalo, Finland
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| Silver | Hilkka Kuntola, Finland
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| Bronze | Raisa Smetanina, USSR
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10 km
| Medal | Athlete | Time |
| Gold | Zinaida Amosova, USSR
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| Silver | Raisa Smetanina, USSR
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| Bronze | Hilkka Kuntola, Finland
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20 km
| Medal | Athlete | Time |
| Gold | Zinaida Amosova, USSR
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| Silver | Raisa Smetanina, USSR
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| Bronze | Helena Takalo, Finland
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4 x 5 km relay
| Medal | Athlete | Time |
|---|---|---|
| Gold | Finland (Taina Impiö, Marja-Liisa Hämälänien, Hikka Kuntola, Helena Takalo)
| |
| Silver |  East Germany (Marlies Rostock, Birgit Schreiber, Barbara Petzold, Christel Meinel)
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| Bronze | USSR (Nina Rocheva, Zinaida Amosova, Raisa Smetanina, Galina Kulakova)
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Men's Nordic combined
Indivudal
| Medal | Athlete | Points |
| Gold | Konrad Winkler, East Germany
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| Silver | Rauno Miettinen, Finland
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| Bronze | Ulrich Wehling, East Germany
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Men's ski jumping
Individual normal hill
| Medal | Athlete | Points |
| Gold | Matthias Buse, East Germany
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| Silver | Henry Glass, East Germany
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| Bronze | Aleskey Borovitin, USSR
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Individual large hill
| Medal | Athlete | Points |
| Gold | Tapio Räisänen, Finland
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| Silver |  Alois Lipburger, Austria
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| Bronze | Flako Weisspflog, East Germany
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