Josef "Sepp" Zeilbauer (born 24 September 1952, in Mürzzuschlag) is a retired decathlete from Austria. His personal best in the event was 8310 points, achieved on 16 May 1976 at a competition in Götzis.
| Year | Tournament | Venue | Result | Points | |
|---|---|---|---|---|---|
| 1970 | Paris, France | 4th | 6.943 | ||
| 1971 | Helsinki, Finland | 5th | 7.842 | ||
| 1972 | Munich, West Germany | 9th | 7.741 | ||
| 1974 | Rome, Italy | 7th | 7.792 | ||
| 1975 | Rome, Italy | 1st | 7.820 | ||
| 1976 | Montreal, Canada | DNF | |||
| 1977 | Sofia, Bulgaria | 1st | 7.961 | ||
| 1978 | Prague, Czechoslovakia | 4th | 7.988 | ||
| 1979 | Mexico City, Mexico | 1st | 8.194 | ||
| 1980 | Moscow, USSR | 5th | 8.007 |