How many markets does Polymarket have?

The number depends on what you call a market

Polymarket runs on two nested units and the question is usually asked without specifying either. An event is the page you land on, with a title, a chart, and a resolution date. A market, in the exchange's own vocabulary, is one Yes or No contract inside that page. Sometimes the two are the same thing. The page asking whether the U.S. invades Iran before 2027 holds exactly one contract, because there is only one way to ask it.

Often they are not. The Next Prime Minister of Ethiopia page held 33 separate contracts on July 28, 2026, one per named candidate, each with its own price and its own order book. One of those contracts is a page on this site: the Adanech Abiebie contract is a market by the exchange's definition and a line item on the event page by the reader's. The 2028 nomination and election pages are larger still. How that structure works, and why the prices inside one of these fields behave differently from a standalone question, is covered in what is a multi-outcome market on Polymarket.

So a single true statement about the platform can be phrased as thirteen thousand markets or as several hundred thousand, and both speakers can be reading the same API on the same afternoon. The table below gives the figure each defensible unit produces.

Six answers to the same question, all read on the same day

The two columns most worth separating are the third and the fifth. The count of contracts open and accepting orders describes what the exchange is actively matching today. The count of contract records ever created describes everything the platform has ever registered, the overwhelming majority of which resolved long ago. Neither is more correct than the other, but they answer different questions and they are frequently quoted as if they were interchangeable.

Most of the catalogue was created this year

The all-time figures are dominated by very recent listings. Of the 745,878 events in Polymarket's history, 619,185 carried a start date in 2026, and 735,330 carried a start date in 2025 or later. That leaves roughly ten thousand events across every year before 2025, against more than six hundred thousand in the first seven months of 2026 alone. Reading the same endpoint for shorter windows, 116,010 events started in the previous thirty days and 31,546 in the previous seven, which works out at roughly 4,500 new events a day.

A rate like that is not a platform adding four and a half thousand fresh questions about the world every morning. It is a platform that has automated the listing of recurring fixtures. Each football match, each tennis tie, and each daily crypto price threshold generates its own event, resolves within hours or days, and is replaced the following week by the next fixture in the calendar. The all-time number is therefore closer to a measure of how many fixtures have taken place since that automation switched on than to a measure of how broadly the platform covers the world.

The turnover shows in the open set too. Of the 13,231 events open on July 28, 2026, 7,823 were scheduled to end within seven days and 10,676 within thirty. Only about a fifth of what was open that day had a horizon longer than a month. Any count of open Polymarket markets is a photograph of a set that mostly will not exist in a fortnight, which is the strongest argument for attaching a date to the figure.

What is open right now, by category

Polymarket is known for its political questions, and those are the ones that reach the news, but they are a small share of the catalogue. Counting the 13,231 open events by tag on July 28, 2026 puts sport first by a distance.

Tags overlap, so the column does not sum to 13,231. Soccer sits inside sports, and elections overlaps politics. The shape still holds: more than half of everything open was tagged sport, and soccer on its own accounted for close to a third of the entire open catalogue. Politics and elections together came to under a fifth. A reader who pictures Polymarket as an election market is picturing the part that gets written about rather than the part that gets listed.

Why published market counts disagree so badly

Three failure modes account for nearly all of the spread between published figures, and they stack.

The first is the unit problem set out above. A page that says Polymarket has thirteen thousand markets and a page that says it has hundreds of thousands can both be reading current data honestly.

The second is staleness. Statistics round-ups that still rank for this question report figures such as 15,000 total unique markets created by the end of 2024 and around 5,000 active markets as of December 2024. Those may have been accurate when written. Set against 619,185 events started in 2026 alone, they describe a different platform, and they are usually republished without the original date attached.

The third is a quiet technical trap. Polymarket's public list endpoints stop paginating at an offset of 2,100 and return a validation error beyond it. Anyone counting by walking the list one page at a time reaches exactly 2,100 records and stops, with no error in the data itself to signal that the walk was truncated. We hit that ceiling ourselves on both the market and the event list while assembling this page, which is why the figures here come from the endpoint that reports a total directly and from a full cursor-based census of the exchange rather than from paging a filtered list. How this desk assembles and dates its own figures is set out on the methodology page.

A large catalogue is not a deep one

The count says nothing about how much money stands behind any individual question, and the distribution is heavily skewed. Taking the 2,100 open markets with the highest 24-hour volume on July 28, 2026, which is the most the public list would return, the top one percent of them carried 46 percent of the total 24-hour volume across the whole group, and the top ten percent carried 76 percent. Those 2,100 markets are already the busiest end of the catalogue, so the concentration across all open markets is steeper still.

That is the practical reason this desk covers 400 markets rather than attempting all of them. A market with no resting orders has a price in the same sense that an empty auction has a price, and the difference between a headline volume figure and the depth actually resting on a book is the subject of volume versus liquidity on Polymarket. The number of markets a platform lists is a fact about its listing automation. What a price on any one of them is worth reading as is a separate question, and a smaller one.

The same caution applies to the participant side. A catalogue growing by thousands of events a day does not imply a user base growing at that rate, and the two figures are often quoted together as though it did. What the public record shows about the number of accounts is set out in how many people use Polymarket.

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