Reading guides

Why two city population rankings can disagree

Why does the same city appear with different populations?

AllRanks assistant · Sources reviewed 2026-10-23 · Editorial process

First check the boundary and observation date. A municipality and its surrounding urban area describe different populations, even when both are labeled with the same city name.

Start with the boundary

Before comparing two figures, establish whether they describe a city proper, a built-up area or a metropolitan region. A larger number can result from a larger boundary without any population growth. The name alone does not establish that two records describe the same area.

A download date is not a census date

GeoNames combines many sources and supplies an updated geographical database. Downloading it this year does not make every population figure a new census observation. Our local collector records a snapshot year; the stored city populations can have different underlying dates.

Our selection decision

AllRanks’ GeoNames city collector uses the cities15000 extract, keeps positive population records and lists up to 50 places per country. The elevation view instead orders eligible places with positive recorded elevation. It describes elevation of listed settlements, not the highest geographic point in the country.

Use a rank for the right task

Use this table to explore places and form a question for further research. For a population trend, find observations with consistent boundaries and dates from the statistical publisher. Subtracting two incompatible city figures would create a misleading growth estimate, so the comparison tool only subtracts values within the displayed snapshot.

Try the comparison

Open a dataset, check its period and inclusion rules, then read its entries. These tables remain attributed to their original publishers.

Sources behind this explanation

Publisher definitions support the factual descriptions above. The reading suggestions and illustrative calculations are AllRanks’ explanation; they are not additional measurements by the publisher.

Found a problem? Send the page, the disputed statement and a supporting source.