Purno Agitok Sangma (P A Sangma) was born in 1 September 1947 in a village Chapathi in West Garo Hills, Meghalaya to Dipchon Ch. Marak and Smt. Chimri A. Sangma.
- In 1973, he became Vice-President of the Pradesh Youth Congress in Meghalaya and became the General Secretary the next year.
- In 1977, he was elected to the 6th Lok Sabha from Tura (Lok Sabha constituency) and remained a member of the Lok Sabha until 14th Lok Sabha, except for the 9th Lok Sabha.
- He served as the Chief Minister of Meghalaya from 1988 to 1990.
- He was a co-founder of the Nationalist Congress Party (NCP).