Wang Mang (c. 45 BCE – 6 October 23 CE), courtesy name Jujun, is a Han Dynasty official who seizes the throne from the Liu family and founds the Xin (or Hsin, meaning "new") Dynasty, ruling AD 9–23.

The Han dynasty is restored after his overthrow and his rule marks the separation between the Western Han Dynasty (before Xin) and Eastern Han Dynasty (after Xin).

Some historians have traditionally viewed Wang as a usurper, while others have portrayed him as a visionary and selfless social reformer.

Though a learned Confucian scholar who seeks to implement the harmonious society he sees in the classics, his efforts end in chaos.