The Governor of Kauaʻi (Hawaiian: Kiaʻaina o Kauaʻi) was the royal governor or viceroy of the island of Kauaʻi and island of Niʻihau during the Kingdom of Hawaii. The Governor of Kauaʻi was usually a Hawaiian chief or prince and could even be a woman. The governor had authority over the islands of Kauaʻi and Niʻihau, and it was up to the governor to appoint lieutenant governors to assist them. The governor had replaced the old alii aimokus of the islands, but the sovereignty remained with the king. The first governor was the last king of Kaumualiʻi, and it was not until his death in 1824 that Queen Kaʻahumanu and King Kamehameha II took control from his sons.