The administration set up by the British continued even after Independence. Darrang district with head quarter at Tezpur continued as an impotant district of Assam.
Towards 1961, Tezpur started to become a center of Trade and Commerce. A year later, in 1962, war broke out with China. The Chinese Army advanced up-to Sessa near Bhalukpung. People started fleeing from their homeframe.htms. The war had left a bitter experience in the minds of the people of the district.
In 1983, Darrang district was bifurcated. Tezpur sadar sub-division was named as Sonitpur district with an outlying Sub-Division at Biswanath Chariali. Mangaldoi sub-division was named as Darrang district.
On 15th August, 2000, another Sub-Division namely Gohpur Sub-Division was carved out from the erstwhile Biswanath Sub-Division.
In the year 2015, Sonitpur district was bifurcated. Tezpur Sub-Division was named as Sonitpur District . Biswanath and Gohspur Sub-Division was named as Biswanath District.
Two major events in the field of communication and education can be cited as landmarks in post-independence history of the district. The first one being the construction of Kalia Bhomora Bridge and its inauguration on 14th April,1987, by Rajiv Gandhi, the then Prime Minister of India. The second one is the establishment of a Central University at Napaam named as Tezpur University.
In the cultural front one can very well name the trio of Assamese culture who were born in the district. The post independence era had seen their talents flourishing which had not only enriched the cultural horizon of the district but has also contributed to formation of a composite Assamese culture .
Sonitpur in the 21st Century looks forward to the future with bright prospects.