How many societies run an abstract-driven meeting? The counts, with sources and method
Nobody publishes the number. There is no statistic, from any analyst or association, for how many societies run a call for abstracts and a peer-reviewed program each year — the category sits below the resolution of the market reports that cover event software as a whole. What exists are the counts around it: how many learned societies there are, how many association meetings are held, how many US organizations report spending on conferences, and the medical and scientific societies that can be listed by name. They are below, each with its source. Where a number was counted from public bulk data rather than read from a report, it is marked Derived and the method is stated so your own analyst can reproduce it.
The IRS publishes its Exempt Organizations Business Master File and an annual extract of Form 990 filings as bulk downloads. The professional-society count filters the master file on the National Taxonomy of Exempt Entities code for professional societies and associations (the codes ending in 03). The conference-expense counts read Part IX, line 19 of each Form 990 — the line on which a filer reports conferences, conventions and meetings — and count the filers above $100,000 and above $1,000,000. The speaker-program count comes from the CMS Open Payments file for program year 2025, counting the companies that recorded payments in the speaker-program categories. Each is a single filter on a public file; the addresses are in the table.
Reading the numbers together
The global counts and the US counts are not the same population and do not add. Read them as bounds: there are somewhere under twenty thousand learned societies in the world and somewhere over twelve thousand international association meetings a year; within the United States, about nineteen thousand tax-exempt organizations spend more than $100,000 a year on meetings, and a few hundred medical and scientific societies can be named individually from their federations’ rosters. An abstract-driven meeting — one with a call, peer review and a selected program — is a subset of all of these, and the honest answer to the question in the title is that the subset has never been measured.
Two figures are worth a caution. The 501(c)(6) count includes chambers of commerce and trade boards that hold no scientific meeting, so it is a ceiling, not an estimate. The international-meetings counts from ICCA and the UIA differ because they use different definitions of “international”; both are given, and neither should be quoted without its definition.
Every figure links to its origin in the table. The bulk files are large; the IRS and CMS pages linked describe their layouts. If a source has published a newer figure since 20 August 2026, the source is right and this page is out of date — tell us.