Census of India in the context of 2027 census of India

The 2011 census of India or the 15th Indian census was conducted in two phases, house listing and population enumeration. The House listing phase began on 1 April 2010 and involved the collection of information about all buildings. Information for National Population Register (NPR) was also collected in the first phase, which will be used to issue a 12-digit unique identification number to all registered Indian residents by Unique Identification Authority of India. The second population enumeration phase was conducted between 9 and 28 February 2011. Census has been conducted in India since 1872 and 2011 marks the first time biometric information was collected. According to the provisional reports released on 31 March 2011, the Indian population increased to 1.21 billion with a decadal growth of 17.70%. Adult literacy rate increased to 74.04% with a decadal growth of 9.21%. The motto of the census was Our Census, Our Future.

Spread across 28 states and 8 union territories, the census covered 640 districts, 5,924 sub-districts, 7,935 towns and more than 600,000 villages. A total of 2.7 million officials visited households in 7,935 towns and 600,000 villages, classifying the population according to gender, religion, education and occupation. The cost of the exercise was approximately ₹2,200 crore (US$260 million) – this comes to less than US$0.50 per person, well below the estimated world average of US$4.60 per person.

The Tulu language (Tuḷu Bāse, Tigalari script: 𑎡𑎻𑎳𑎻 𑎨𑎸𑎱𑏂, Kannada script: ತುಳು ಬಾಸೆ, Malayalam script: ത‍ുള‍ു ബാസെ; pronunciation in Tulu: [t̪uɭu baːsɛ]) is a Dravidian language whose speakers are concentrated in Dakshina Kannada and in the southern part of Udupi of Karnataka in south-western India and also in the northern parts of the Kasaragod district of Kerala. The native speakers of Tulu are referred to as Tuluva or Tulu people and the geographical area is unofficially called Tulu Nadu.

The Indian census of 2011 reported a total of 1,846,427 native Tulu speakers in India while the 2001 census had reported a total of 1,722,768 native speakers. There is some difficulty in counting Tulu speakers who have migrated from their native region as they are often counted as Kannada speakers in Indian census reports.

Noida (Hindi: [noːeːɖaː]), short for New Okhla Industrial Development Authority (Hindi: Navīn Ōkhalā Audyōgik Vikās Prādhikaraṇ), is a city located in Gautam Buddha Nagar district of the Indian state of Uttar Pradesh. As per provisional reports of Census of India, the population of Noida in 2011 was 642,381. The city is managed by the New Okhla Industrial Development Authority (NOIDA). The district's administrative headquarters are in the nearby city of Greater Noida.

The city is a part of the Noida (Vidhan Sabha) constituency and Gautam Buddha Nagar (Lok Sabha) constituency. Noida was ranked as the "Best City in Uttar Pradesh" in the "Best City Awards" conducted by ABP News in 2015. It is also ranked the cleanest city in medium category cities (cities with a population of 300,000 to 1,000,000) and 4th cleanest city among cities with less than 1,000,000 people.

This is a list of the most populous cities in India. Cities are a type of sub-administrative unit and are defined by the Ministry of Home Affairs. In some cases, cities are bifurcated into municipalities, which can lead to cities being included within other cities. This list is based on the Census of India using data from the 2001 census of India and the 2011 census of India.

Census in British India refers to the census of India prior to independence which was conducted periodically from 1865 to 1941. The censuses were primarily concerned with administration and faced numerous problems in their design and conduct ranging from the absence of house numbering in hamlets to cultural objections on various grounds to dangers posed by wild animals to census personnel. The sociologist Michael Mann called the census exercise "more telling of the administrative needs of the British than of the social reality for the people of British India". The differences in the nature of Indian society during the British Raj from the value system and the societies of the West were highlighted by the inclusion of "caste", "religion", "profession" and "age" in the data to be collected, as the collection and analysis of that information had a considerable impact on the structure and politics of Indian society.