2011 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. Wikipedia
Dates: Feb 9, 2011 – Feb 28, 2011
Location: India
Least populous state: Sikkim (610,577)
Most populous state: Uttar Pradesh (199,812,341)
Scheduled Castes: 201,378,372
Scheduled Tribes: 104,545,716
Total population: 1,210,854,977 (17.70%)