Kaminahu (Arabic: مملكة كمنه; Old South Arabic: 𐩫𐩣𐩬𐩠𐩥 kmnhw; modern Kamna) is the name of an ancient South Arabian city in the northern al-Jawf region of present day Yemen, 107 km north-east of Sana'a at about 1100 meters above sea level.

In early times Kaminahu like other towns in al-Jawf such as Ḥaram and Nashan, was an independent city state.

In about 715 BCE Kaminahu was conquered by Yitha’amar Watar I of Saba', after which it annexed Nashan and the neighbouring town of Manhiyat.

685 BCE) and probably in the one against Awsān, Ilsamaʿ from Kaminhau along with Yadhmurmalik from Ḥaram supported the Sabaeans; as a reward Kamninahu was allotted an irrigation canal conquered from Nashan.

Kaminahu, and its neighbors, Haram (Yemen), Nashan and Inabba' were civil temple settlements and city states.