998
| Years | 
|---|
| Millennium | 
| 1st millennium | 
| Centuries | 
| Decades | 
| Years | 
| 998 by topic | 
|---|
| Leaders | 
| Categories | 
| 
 | 
| Gregorian calendar | 998 CMXCVIII | 
| Ab urbe condita | 1751 | 
| Armenian calendar | 447 ԹՎ ՆԽԷ | 
| Assyrian calendar | 5748 | 
| Balinese saka calendar | 919–920 | 
| Bengali calendar | 404–405 | 
| Berber calendar | 1948 | 
| Buddhist calendar | 1542 | 
| Burmese calendar | 360 | 
| Byzantine calendar | 6506–6507 | 
| Chinese calendar | 丁酉年 (Fire Rooster) 3695 or 3488 — to — 戊戌年 (Earth Dog) 3696 or 3489 | 
| Coptic calendar | 714–715 | 
| Discordian calendar | 2164 | 
| Ethiopian calendar | 990–991 | 
| Hebrew calendar | 4758–4759 | 
| Hindu calendars | |
| - Vikram Samvat | 1054–1055 | 
| - Shaka Samvat | 919–920 | 
| - Kali Yuga | 4098–4099 | 
| Holocene calendar | 10998 | 
| Iranian calendar | 376–377 | 
| Islamic calendar | 387–389 | 
| Japanese calendar | Chōtoku 4 (長徳4年) | 
| Javanese calendar | 899–900 | 
| Julian calendar | 998 CMXCVIII | 
| Korean calendar | 3331 | 
| Minguo calendar | 914 before ROC 民前914年 | 
| Nanakshahi calendar | −470 | 
| Seleucid era | 1309/1310 AG | 
| Thai solar calendar | 1540–1541 | 
| Tibetan calendar | 阴火鸡年 (female Fire-Rooster) 1124 or 743 or −29 — to — 阳土狗年 (male Earth-Dog) 1125 or 744 or −28 | 
Year 998 (CMXCVIII) was a common year starting on Saturday of the Julian calendar.