BharatNotes What is Million-Plus Cities?
A Million-Plus City is an urban agglomeration (UA) or city whose population is one million (10 lakh) or more, as recorded by the Census of India. An urban agglomeration is a continuous urban spread comprising a town and its adjoining outgrowths, or two or more physically contiguous towns, together with their outgrowths.
As per Census 2011, India had 53 Million-Plus UAs/Cities in the provisional results. In the final population totals the figure was 52, because Chandigarh UA — ranked 51st provisionally — fell marginally short of one million in final tabulation.
Where They Sit in the Census Classification
The Census groups towns by population size. Settlements with at least 100,000 persons are Class I towns; in Census 2011 there were 468 such Class I UAs/Towns. Million-Plus Cities are the topmost slice of this Class I category.
| Census 2011 category | Threshold | Count |
|---|---|---|
| Class I UAs/Towns | ≥ 1,00,000 | 468 |
| Million-Plus UAs/Cities | ≥ 10,00,000 | 53 (provisional); 52 (final) |
| Mega Cities | ≥ 1 crore (10 million) | 3 |
The three mega cities (Census 2011) were Greater Mumbai UA (18.4 million), Delhi UA (16.3 million) and Kolkata UA (14.1 million).
Significance
Million-Plus Cities concentrate population, economic activity and infrastructure demand. Per Census 2011, about 160.7 million persons — roughly 42.6% of India's urban population — lived in these centres, even though they were a tiny fraction of the total number of towns. This concentration explains why they dominate debates on housing, slums, water supply, sanitation, transport and air quality.
They are also the primary focus of national urban programmes. The Atal Mission for Rejuvenation and Urban Transformation (AMRUT), launched in June 2015, selected 500 cities for basic civic infrastructure, of which the Million-Plus tier forms the core. The Smart Cities Mission and earlier JNNURM similarly prioritised large cities.
Current Status
The most recent official enumeration remains Census 2011, since the decadal Census due in 2021 was deferred; therefore the authoritative "53/52 Million-Plus Cities" figure still derives from 2011 (as of June 2026). Urban-population estimates published since are projections, not fresh Census counts — a point worth flagging in answers, as the actual number of Million-Plus Cities has almost certainly risen with continued urbanisation.
UPSC Angle
For Prelims, memorise the thresholds (Class I ≥ 1 lakh; Million-Plus ≥ 1 million; Mega City ≥ 10 million), the 2011 counts (468 Class I; 53/52 Million-Plus; 3 mega cities), and the 42.6% urban-population share. For Mains GS1, link Million-Plus Cities to problems of over-urbanisation, slum proliferation and overstretched civic services; for GS3, connect them to AMRUT and Smart Cities infrastructure financing. A common trap is conflating "city", "urban agglomeration" and "Class I town" — keep the definitions distinct.
