Methodology

Country and territory population figures are drawn from the United Nations' World Population Prospects, 2024 Revision — the UN Population Division's medium-variant estimates, which are the same baseline most government statistics offices and international organizations cite when comparing countries on a common basis. Where a country's own national census is more recent than the UN's estimate window, that's noted on the individual country page rather than silently overridden, since national censuses and UN projections don't always agree to the last digit and readers deserve to know which one they're looking at.

Population is inherently a moving target, so every figure on this site carries the year it applies to instead of being presented as a timeless constant. The full dataset is scheduled for a refresh once per year, in step with the UN's own revision cycle, rather than being updated piecemeal or left stale between full site reviews.

Flag SVGs are sourced from flag-icons, an open-source library maintained by Panayiotis Lipiridis and contributors, licensed under MIT. The library is installed as a build dependency and its files are copied into this site at build time — flags are never fetched from a third-party server at runtime, so a page never depends on an external CDN being up. The underlying flag *designs* themselves are national symbols, which every vexillology reference treats as free to depict; the MIT license covers the SVG files specifically. Two entries in our roster (Kosovo and Vatican City) use widely-adopted but non-official ISO-style codes (xk and va) supplied by the same library, since neither has a universally agreed-upon standard code.

The narrative on each flag page — why particular colors or symbols were chosen, when the current design was adopted, what earlier versions looked like — is researched from a combination of national government and embassy publications (many countries publish an official explanation of their flag's symbolism), established vexillology references, and encyclopedic sources, cross-checked against each other rather than taken from a single site. Where sources genuinely disagree — and they do, particularly on flags whose origin predates reliable written records, or where a government's official story and a historian's account diverge — that disagreement is described rather than papered over with a single confident-sounding claim.

Adoption dates specifically refer to the current design's official adoption, which is not always the same as a country's independence date; several countries kept a colonial-era or transitional flag for years before adopting the design shown on this site, and that gap is called out where it's historically significant.

The roster covers all current UN member states plus a small number of widely-recognized non-member territories and observer states (Vatican City among them) that are commonly included in flag references and geography curricula. It does not attempt to adjudicate contested sovereignty claims; where a territory's status is genuinely disputed, the page notes the dispute rather than taking a side.

Flags change, borders shift, and figures get superseded — Turkey's official rebrand to Türkiye and Sri Lanka's post-independence flag revisions are the kind of change that requires an update outside the normal annual refresh. If you spot an error, an outdated figure, or a source you think we've got wrong, use the contact page or write to contact@vexiwiki.com. Corrections are verified against a primary or authoritative secondary source before publishing, and factual corrections are prioritized ahead of the next scheduled annual refresh rather than held for it.