He was 96 and survived by wife, three sons and two daughters.
Das was taken to the ICU at Balasore district Hospital on August 11 due to old age ailments, the family said.
He was elected as MLA on the Indian National Congress ticket from Bhograi assembly constituency from Balasore district in 1957 and continued till 1961.
As a freedom fighter, he was imprisoned for 32 months during the 'Quit India movement' against British Raj.
Odisha Chief Minister Naveen Patnaik, Union Petroleum Minister Dhermendra Pradhan expressed grief.
His body was taken to his native village Taladi in Bhograi Block for last rites.
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