Meidingu Thawanthaba or Thawan Thaba (Meitei: ꯊꯋꯥꯟꯊꯥꯕꯥ, romanized: Thawaanthaabaa) was a Meitei ruler of the Ningthouja dynasty of Medieval Kangleipak who ruled from 1195 CE to 1131 CE.
He is the central figure in the historical Meitei language literary work, Thawanthaba Hiran (ꯊꯋꯥꯟꯊꯥꯕꯥ ꯍꯤꯔꯥꯟ), a tragedy based on a crime story. He ascended the throne during a relatively peaceful period in Manipur's history and also during a time of rivalry and occasional alliance between the Meiteis (Ningthoujas) and Khumans.