P. Shilu Ao (24 December 1916 – 19 September 1988) was a Naga politician who was involved in the negotiations leading to the creation of Nagaland, in the north-eastern part of India, as one of the states and territories of India in December 1963. Ao then served as the first Chief Minister of Nagaland until August 1966. Ao played a part in persuading the Indian Government and the Lok Sabha to grant Nagaland separate statehood but was not able to reconcile many Naga nationalists who regarded him and his party, as stooges of the central government.
Ao was born in the Longjang village of the district of Mokokchung to Metongchiba Pongen and Melungnenla Imchen on 24 December 1916. He was schooled at the Impur Mission Schoolwhere he passed his class VI in 1st division in 1934,and did his matriculation from Jorhat Mission School in 1st Division which was also regarded as one of the biggest achievements of his time and later completed his Intermediate Arts and a bachelor’s degree in Arts in year 1952 and a law degree from the Cotton College, Guwahati and the Guwahati University. He also served as a primary school teacher in the year 1939 and 1940 at his native village Longjang on monthly salary of Rs 10. He later taught at Impur Mission School from 1941 to 1947 after his Intermediate education. He also pursued and completed his Bachelor of Teaching from Shillong in year 1953. Like the majority of Naga people, he was a Christian and was Chairman/President of the Ao Christian Mungdang (ABAM) Platinum Jubilee Celebration in year 1946. He then worked as a school teacher, as a headmaster and the Inspector of Schools at Kohima from year 1948 to year 1949. Having joined the administrative service of Assam in 1954, Ao served as an assistant commissioner and first-class magistrate with the Government of Assam from 1954 to 1960. He also served as Pastor-in-Charge of Kohima Ao Baptist Church from year 1948 to year 1949. In the year 1950 to 1952 he also served as Headmaster of Government Middle School, Wokha. He served under Government of Assam as EAC cum First Class Magistrate during years 1954 to 1960.