Ishwar Manikya was briefly the Maharaja of Tripura at the close of the 16th century.

It is believed that in the aftermath of the death of Rajdhar Manikya I in 1600, some confusion arose in regards to the succession to the throne.^[1] Historian Jai Prakash Singh suggests that the inauspicious horoscope of the old king's heir, Yashodhar, made the nobility hesitant in accepting him as monarch. It was through such a situation that Ishwar, as well as another individual, Virabhadra Manikya, made bids for the throne, though the former appears to have been more successful.^[2]

His original name^{[note 1]} and relationship with the previous king are unknown. Among the possibilities is that he had been a brother of Yashodhar.^[1] Alternatively, he may have been Amaradurlabha, the younger brother of Rajdhar, who had been a distinguished veteran of the Arakan wars under Amar Manikya.^[3][4] Otherwise, he may have belonged to a collateral branch of the ruling dynasty.^[1]

There were coins minted in his name, though there is practically nothing known about him, with his name being omitted from the Rajmala, the Tripura royal chronicle.^[3] He was eventually ousted after a few months of rule in favour of Yashodhar, who had finally found backing from the nobility and formerly ascended the throne.^[1][2]