• A district of an Indian state is an administrative geographical unit, headed by the Deputy Commissioner (DC), which combines the offices of the District Magistrate ultimately responsible for maintaining law and order and is also responsible for collection of the revenue.
• Generally, an officer belonging to the Indian Administrative Service becomes the DC but occasionally of??cers belonging to the State Civil Service ( like ACS) too get appointed.
• The DC is assisted by a number of officials belonging to different wings of the administrative services of the state.
• Assam is divided into 33 administrative geographical units of districts, which are further divided into 78 subdivisions, which are the administrative units.
• Assam has 155 Tehsils, which represent revenue collecting units under a district administration, and both are treated as sub–districts.
• The districts of Assam are grouped together in five regional divisions, headed by a Commissioner.
• A superintendent of Police, an officer belonging to Indian Police Service is entrusted with the responsibility of maintaining law and order and related issues.
• The police administration in Guwahati City is headed by the Commissioner of Police, which started functioning from 1 January 2015.

List of Districts in Assam – With some important statistics

Smallest district

• In terms of Area, South Salmara-Mankachar district is the smallest district in Assam with an area of 568 square km.
• In terms of population, Majuli district is the least populated district in Assam with a population of approx. 167,304

Largest district

• In terms of Area, Karbi-Anglong is the largest district of Assam with nearly 10,434 square kms of area.
• In terms of population, Nagaon is the largest district of Assam with a population of approx. 28,23,768.