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 Tinsukia district is known for its tea gardens and natural resources. It is situated in between 27°23' to 27°48'N latitude and   93°22' to 95°38'E at the north partially by the mighty Brahmaputra River separating the district of Dhemaji from Tinsukia, by Arunachal Pradesh in the east west and by Dibrugarh district in the south west. Soils are sandy to clayey and acidic in nature. The climate is subtropical, warm and humid with an average annual rainfall of 2500 mm. and average rainy days are 140 to 150 days per year. The average maximum temperature is about 39⁰ C and minimum 9⁰ C. The climate is excellent and nature has bestowed all its blessings in the form of deep forest, grand rivers, exquisitely beautiful landscape, diverse flora and fauna,lovely tea gardens and bio-diversity hot spots.

.The ancient name of Tinsukia was Bangmara which was originally known as Changmai Pathar. It was the capital of Muttack Kingdom. The Bangmara city was built by King Sarbananda Singha with the help of his Minister Gopinath Barbaruah alies Godha. The city was built in the middle of the present Tinsukia City (near the Senairam H.S. School).

As per the direction of Sarbananda Singha, Godha Baruah dug a triangular shaped pond in Bangmara which is known as "Tinikunia Pukhuri". In 1884 Dibru-Sadiya Railline was constructed and a station was setup near the "Tinikunia Phukhuri" which was named as Tinsukia. Since then the City was popularly known as Tinsukia.

The present Tinsukia district was formed by carving out Tinsukia subdivision from undivided Dibrugarh district. At present Tinsukia district comprises of three subdivisions: Tinsukia, Margherita and Sadia.

Administrative
setup (As per 2001 census)

Number of sub-division      : Three (3)

Number of Blocks            : Seven (7)

Gram Panchayat              : 88

Number of Villages          : 1162 nos.

Total land holdings        : 84927 nos

Agro-ecological situations of the district:

The district is divided into 3 agro-ecological situations such as:
1. Humid alluvial flood prone situation,
2. Humid alluvial flood free situation and
3.Sub-humid alluvial flood free situation, foot hills.
The details of identified agro-ecological situations are presented below: