| Event: | Judo |
| Games: | 1998 Asian Games |
| Venue: | Thammasat Gymnasium 1 |
| Dates: | 7–10 December 1998 |
| Competitors: | 184 |
| Nations: | 25 |
| Prev: | 1994 |
| Next: | 2002 |
The Judo competition at the 1998 Asian Games was contested in fourteen weight classes, seven each for men and women, held at the Thammasat University in Thailand.
| P | Preliminary rounds & Repechage | F | Finals |
| Event↓/Date → | 7th Mon | 8th Tue | 9th Wed | 10th Thu | |||||
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| Extra lightweight (−60 kg) | |||
| Half lightweight (−66 kg) | |||
| Lightweight (−73 kg) | |||
| Half middleweight (−81 kg) | |||
| Middleweight (−90 kg) | |||
| Half heavyweight (−100 kg) | |||
| Heavyweight (+100 kg) | |||
| Extra lightweight (−48 kg) | |||
| Half lightweight (−52 kg) | |||
| Lightweight (−57 kg) | |||
| Half middleweight (−63 kg) | |||
| Middleweight (−70 kg) | |||
| Half heavyweight (−78 kg) | |||
| Heavyweight (+78 kg) | |||
A total of 184 athletes from 25 nations competed in judo at the 1998 Asian Games: