Al-Hassan Hamid al-Din ibn Yahya (13 June 1908 – 13 June 2003) was a Yemeni royal and statesman who served as the Prime Minister of the Mutawakkilite Kingdom of Yemen, once from April 1948 to August 1955, a second time from 1962 to 1967, and a third time from 1969 to 1970.

After his father's assassination, he supported his older brother Ahmad in becoming King of Yemen.

Following a coup attempt by their younger brother Abdullah, he was dismissed as prime minister after being wrongfully suspected of supporting the coup attempt.

After the republican coup, the attack on his nephew King Muhammad's residence Dar al-Bashair, and the king's rumored death, ibn Yahya proclaimed himself King and traveled to Saudi Arabia, where he learned that his nephew was still alive.

He was appointed prime minister of the government-in-exile and served two terms (1962–1967, 1969–1970).