| 1978 World Junior Figure Skating Championships | |
| Comptype: | ISU Championship |
| Startdate: | March 21 |
| Enddate: | 26, 1978 |
| Skatingseason: | 1977–78 |
| Location: | Megève, France |
| Championmen: |  Dennis Coi |
| Championladies: |  Jill Sawyer |
| Championpairs: | Barbara Underhill / Paul Martini |
| Championdance: | Tatiana Durasova / Sergei Ponomarenko |
| Previouscomp: | 1977 World Junior Championships |
| Nextcomp: | 1979 World Junior Championships |
The 1978 World Junior Figure Skating Championships were held on March 21–26, 1978 in Megève, France. Sanctioned by the International Skating Union, it was the third edition of an annual competition in which figure skaters compete for the title of world junior champion. Medals were awarded in the disciplines of men's singles, ladies' singles, pair skating, and ice dancing.
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