Sewer King is a antagonist in Batman: The Animated Series that appeared in the episode The Underdwellers. He is voiced by Michael Pataki.
A man shunned by society and stricken by poverty, The Sewer King decides to live in the sewer. His real name is unknown. He kidnapped orphans, and made them work for him in a cold dark sewer, and struck them with silence and abuse. Batman stumbled upon his underground society and freed the orphans, destroy the evil society, and help the orphans find good homes. The Sewer King was taken to jail, were he resides today. He had pet alligators that were taken to the zoo. The Sewer King waits patiently for his pets to free him from prison.