What is WorldFill?
WorldFill is a live, interactive map of the entire world, broken into more than 4,600 individual regions — every state, province, and territory on Earth. Anyone can claim the region they're in, once, and the map colors itself a little brighter there. Do that enough times, from enough places, and the map becomes a real-time census: a visual record of where the people engaging with this project actually are.
There's no way to "finish" WorldFill. Unlike a checklist or a progress bar that completes and stops being interesting, this map is designed to keep growing — more claims, more regions lit up, a new hottest region tomorrow. It's a receipt of reach, not a race to zero.
How it works
- Open the map. WorldFill automatically detects the region you're in — no menu to browse, nothing to pick.
- Confirm your region. One tap adds a single, permanent claim to that region's count.
- Watch it light up. Every claim makes that region glow a little brighter relative to the rest of the world — and everyone else sees it happen live.
- The map keeps growing. Density only ever goes up, one claim, one region, one person at a time.
Why regions, not just countries
A country-level map — roughly 195 units — is too coarse to say anything interesting once colored in. It would just show "which countries have visitors," which any ordinary analytics dashboard already tells you. Splitting the world into states, provinces, and territories instead — over 4,600 of them, sourced from Natural Earth — makes the map genuinely specific: not just which country, but which state, which province. A handful of countries with no such subdivision in the source data (Singapore, Vatican City, Monaco, and other small nations) are claimable as a single whole-country region instead.
Keeping the map honest
The whole point of WorldFill is that it reflects where people actually are — so it only works if one claim reliably means one real person. A few rules keep it that way:
- You can't choose your region. It's detected automatically from your location and enforced on the server, not just hidden behind a menu in the interface — so there's no way to inflate an arbitrary region on purpose.
- One claim per person, ever. Once you've claimed a region, that's it — claiming isn't something you can repeat to pad a region's count.
- Regions aren't exclusive. Claiming a region doesn't take it away from anyone else — there's no "someone beat you to it." Every region can hold as many claims as it genuinely earns.
Disputed territories
A handful of regions sit inside active, real-world border disputes. Rather than silently picking a side, WorldFill flags those regions instead of coloring them normally — they still accumulate claims like any other region, but they're marked visibly as disputed on the map so that's never hidden.
Where the map data comes from
Region boundaries and names come from Natural Earth, a free, public-domain map dataset — no attribution license required, though WorldFill credits it anyway because it's the reason this map exists at all. Population figures shown on the map, where available, are sourced from Natural Earth and Wikidata; where no reliable figure exists for a region, WorldFill shows that honestly rather than guessing.
Frequently asked questions
What is WorldFill?
WorldFill is an interactive world map made up of thousands of individual regions. People claim the region they're located in, and the map fills in as a live heatmap of participation from around the world.
How do I claim a region?
Open the home page — WorldFill detects your region automatically. Confirm it with the claim button, and it's added to the map immediately.
Can people from anywhere in the world participate?
Yes. Every state, province, and territory on Earth — and every country without one — is on the map and claimable.
Can I pick which region I claim?
No — and that's intentional. Your region is detected from your actual location, not chosen from a list. That's what keeps the map a real picture of where people are, rather than wherever people felt like clicking.
What happens when I claim a region?
Your claim adds one to that region's count, permanently. The region's color updates to reflect its new density relative to the rest of the map, visible to every other visitor.
Can I claim more than once?
No — one claim per person, ever. That limit is what keeps a region's count meaning "this many different people," not "this many clicks."
How can I see the current statistics?
The stats page shows live totals, the hottest regions right now, recent claim activity, and which regions are still waiting for their first claim.