Tirtheswar Hazarika (Assamese: তীৰ্থেশ্বৰ হাজৰিকা, 1901–1986) was a freedom fighter, lawyer and Gandhian activist from North Lakhimpur in the Northeast Indian state of Assam.

Tirtheswar Hazarika was born in the year 1901 in North Lakhimpur, a town in the eastern part of what was then the British Indian province of Assam.

Having read Gandhi's philosophy, young Tirtheswar Hazarika travelled more than seventy kilometers by a bicycle to meet him in Jorhat on his first visit to Assam in 1921.

Hazarika had by then become the president of the Indian National Congress' committee in Lakhimpur,[1][4][5] which at that time also included places like Dibrugarh and Dhemaji, in addition to the present territory.

Despite this, as Bose's Azad Hind Fauj (Indian National Army) reached the borders of Assam towards the end of the Second World War in the Japanese Thrust Towards India, son Iswar Prasanna Hazarika reports that Tirtheswar Hazarika continued his Gandhian methods, such as spinning the charkha every morning to lend his support for the Swadeshi Movement,[1] a movement that was based on the idea that economic independence from Britain (swawalamban) would lead to political independence for India (swaraj).

An organisation, called the Tirtheswar Hazarika Memorial Trust, works to provide health services in remote villages in Northeast India.