Sithu Kyawhtin (Burmese: စည်သူကျော်ထင်, pronounced [sìθù tɕɔ̀tʰɪ̀ɰ̃]; also known as Narapati Sithu (နရပတိ စည်သူ, [nəɹa̰pətḭ sìθù])) was the last king of Ava from 1551 to 1555. He came to power by overthrowing King Narapati III in 1551, the culmination of his six-year rebellion (1545–1551) with the support of the Shan state of Mohnyin.