Dong Xian (董賢) (23 BC(?) – 1 BC) was a Han Dynasty politician who quickly rose from obscurity as a minor official to being the most powerful official in the imperial administration of Emperor Ai within a span of a few years. Most scholars agree that Dong's quick career advancement came mostly because of his personal relationship with Emperor Ai, likely a homosexual one, rather than a demonstration of abilities. Both men were married, but Emperor Ai, at least, was childless.