794 (DCCXCIV) was a common year starting on Wednesday of the Julian calendar, the 794th year of the Common Era (CE) and Anno Domini (AD) designations, the 794th year of the 1st millennium, the 94th year of the 8th century, and the 5th year of the 790s decade. As of the start of 794, the Gregorian calendar was 4 days ahead of the Julian calendar, which was the dominant calendar of the time.

• Kyoto becomes the Japanese capital. Begin of the Heian period.
• Council of Frankfurt – oldest known mentioning of Frankfurt.