Start with the question, then choose the boundary
Before looking up a city population, decide what the number must describe. A municipal service study, a regional comparison and a shop's delivery area can require different boundaries. Write down the place, geographic unit, population measure and reference year. A large total is useful only if it covers the people relevant to the question.
What the labels mean
Census 2011 distinguishes statutory towns, recognised through urban local administration, from census towns identified using statistical criteria. Its terminology calls towns with at least 100,000 residents cities. An urban agglomeration, or UA, groups a continuous urban spread: a town with adjoining outgrowths, or adjoining towns with or without outgrowths. The constituent places remain important when interpreting its total. [1]
A municipal figure follows the specified local authority's limits. A district is another administrative geography and may combine urban and rural areas. A business report's 'metro market' needs its own definition: it might describe a planning region, adjoining towns or an analyst's service catchment. Do not assume that the label corresponds to a Census UA.
The difference is visible in the official tables
The final Census 2011 A-04(I) table reports Greater Mumbai UA at 18,394,912 people, while its Greater Mumbai municipal-corporation component has 12,442,373. The UA also includes Thane, Navi Mumbai, Mira-Bhayandar and other listed units. These figures answer different geographic questions; choosing the larger one does not demonstrate a larger reachable customer base. [2]
Pune UA includes Pimpri Chinchwad and cantonments alongside Pune corporation. Jaipur, however, appears as a standalone corporation in the same combined ranking; a footnote explains the earlier incorporation of Sanganer and Amber. A list headed 'largest cities' therefore needs visible unit labels. Adding Pune corporation to Pune UA would count its municipal residents twice. [2]
Choose the catchment before doing the arithmetic
For practical research, make the geographic decision explicit before selecting the headline figure. This keeps convenience from deciding the answer and makes later comparisons easier to reproduce.
- Define the activity: municipal service coverage, household delivery, regional distribution, residential demand or another specific question.
- Describe the reachable area using a map, named wards, settlements or a documented travel-time rule. Explain why that area fits the activity.
- Find population units that cover it. Add mutually exclusive components; exclude places outside the catchment. If boundaries only partly overlap, explain the allocation method instead of treating the whole district as reachable.
- Retain the source table, unit names, boundary assumptions and reference year. If the data cannot support the desired precision, use a broader labelled comparison or a clearly identified estimate.
Keep time and demand separate
A Census 2011 count remains a 2011 observation when displayed on a recently updated website. A later publication date does not make its residents a current count. If you apply a growth assumption, show the starting population, period and method, and label the result as your scenario. Extending a boundary and adding residents is not evidence of migration or natural growth by itself.
Population is also only the starting scale. For a household product, establish the relevant household base; for a store, investigate access and competing alternatives. Eligibility, purchasing power, purchase frequency and attainable share need separate evidence. Resident totals alone cannot establish sales, daytime footfall or tourist demand.
Publish a compact audit note with the result: 'Greater Mumbai UA; Census 2011; A-04(I); includes listed constituent towns.' A reader should be able to identify the original number and understand every adjustment you made.