Phraya Manopakorn Nitithada (Thai: พระยามโนปกรณ์นิติธาดา; IPA: [pʰrá.jaː má.noː.pà.kɔːn ní.tì.tʰaː.daː]; or real name Kon Hutasingha (Thai: ก้อน หุตะสิงห์; IPA: [kɔ̂ːn hù.tà.sǐŋ]); 15 July 1884 – 1 October 1948) was a Siamese nobleman who served as the first prime minister of Siam after the Siamese Revolution of 1932 as he was selected by the leader of the People's Party – the party that instigated the revolution.

It is claimed that he was a member at the Middle Temple, in London, England, but no evidence of his membership can be found in the Inn's admission registers.

[3] After he had finished his education, he began to work for the Ministry of Justice and climbed the traditional career ladder and was eventually granted the title Phraya and received his honorary name: "Manopakorn Nitithada".

The revolutionary Khana Ratsadon Party, not wanting to appear as if it had instigated the revolution for self-aggrandizement, chose Phraya Manopakorn as president of the committee.

King Prajadhipok made an observation that the term "President of the People's Committee" sounded like a communist or Republican post.

In 1933, Pridi Panomyong, by then a Minister of State, presented his Draft Economic Plan or Yellow Cover Dossier to King Prajadhipok.

To regain some stability and silence domestic critics, Phraya Manopakorn had some articles in the constitution suspended.

After the Yellow Dossier Incident, the degree of political freedom was greatly reduced by Phraya Manopakorn's policies.

The 1933 Siamese coup d'état happened on 20 June, led by Phraya Pahol and other military leaders.