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There is a family of statistics about this that has been circulating since roughly 2010 — a share of the internet, a count of pages, a percentage hosted in one country. They turn up in news write-ups, in policy submissions, and in every article on the subject including the one this replaces.
Chase any of them back and the trail ends at a press release, a vendor's marketing page, or a filter company with a product to sell. There is no dataset. Nobody crawled the internet and counted; the numbers are estimates of estimates that acquired authority by being repeated, and the round ones — a share that lands exactly on a decade — are the tell.
So it is worth being clear about what question is even being asked, because "produces the most porn" turns out to be four questions wearing one coat.
Where it gets filmed
For about thirty years this had a genuinely boring answer: a stretch of the San Fernando Valley, north of Los Angeles.
That was not about California being permissive. It was about infrastructure. The Valley already had crews, equipment rental, post-production houses, and a labour pool trained by an adjacent industry, and the legal position in California — following state case law in the late 1980s that made prosecuting the hiring of performers considerably harder — was survivable in a way it was not elsewhere in the US. Cheap industrial real estate did the rest. An industry clusters where the competent people already are, which is the same reason watchmaking sat in Switzerland.
The cluster then loosened, for reasons that were partly regulatory. Los Angeles County's Measure B, passed in 2012, required condom use on shoots within the county and made permits conditional on it. Producers responded largely by not filming in the county: shoots moved to Las Vegas, to neighbouring counties, and to wherever the paperwork was simpler. The industry did not vanish; it decentralised, which is a much harder thing to count.
Europe ran its own version of this. In the 1990s a great deal of production relocated to Prague and Budapest — again for unglamorous reasons, being cost, crew availability and a comparatively unobstructive legal environment — and Budapest in particular spent a decade as the shooting location for a large share of what circulated in the US and Western Europe as European content.
Where the companies live
This is a separate map, and it has never matched the first one.
The single largest tube operator, Aylo — until 2023 named MindGeek, and before that Manwin — is headquartered in Montreal and has been since well before it acquired the brands most people would name. It was bought in 2023 by Ethical Capital Partners, a Canadian private-equity firm. Much of its technical operation has historically run through European entities.
That pattern is normal rather than exceptional. Payment processing, hosting, corporate registration and content acquisition each get placed wherever the regulatory and banking friction is lowest, and that is rarely where anything is filmed. A clip shot in Nevada can be owned by a Cyprus entity, served from Amsterdam, and monetised through a processor in another jurisdiction again. Asking which country that clip belongs to is a question the corporate structure was specifically designed not to have an answer to.
Where the servers are
Hosting concentration is the one thing that could in principle be measured, and it is also the one that tells you least. Large-scale hosting and CDN capacity sits in a handful of countries — the US and the Netherlands prominently — because that is where large-scale hosting and CDN capacity sits for everything, not because of anything specific to this industry.
The page-count statistics are essentially hosting statistics dressed as production statistics, and even as hosting statistics they are unverified. A single tube site generates millions of URLs from one library. Counting pages measures database rows.
Japan is a genuine second answer
If any country has a real claim to being counted separately, it is Japan, because its industry is structurally distinct rather than merely large.
Japanese adult video developed as its own domestic sector with its own studios, its own distribution, its own star system and its own retail channel, largely serving a domestic audience rather than exporting into the same market as US production. Article 175 of Japan's penal code, which prohibits obscene material, is the reason for the pixellation that Western viewers notice first — the mosaic is the compliance mechanism that allows the material to be sold legally at all. Output volume in titles per year has long been high, and it is genuinely hard to compare with anything else, because a Japanese AV release and a US scene are not the same unit.
Anyone actually interested in that output is better served by the Asian and hentai sections than by a ranking.
And then the question dissolved
The reason none of this can be settled now is that professional studio output stopped being the bulk of what exists.
Camming and creator platforms moved production into ordinary residential addresses in every country with reliable broadband. Romania built an entire webcam-studio sector on that, with agency-style operations in Bucharest and other cities; Colombia, the Philippines and Brazil developed comparable ones. Subscription platforms took it further still by removing the studio from the arrangement entirely.
Under that model, "produced in" is a property of an individual's spare room. The relevant map is broadband penetration and payment access, not national industry. There are more countries producing meaningfully than at any prior point, and the output is unregistered, uncounted and largely unattributed — which you can see plainly enough in any amateur or live cam listing.
The short version
Historically filmed: Los Angeles, then a diffuse set of places after 2012. Corporately owned: Canada and a rotating cast of low-friction jurisdictions. Hosted: wherever the cheap racks are. Structurally distinct and large in its own right: Japan. Currently produced: everywhere, by individuals, in quantities nobody is measuring.
The honest answer to which country produces the most is that there is no counting body, no reporting requirement and no audited figure — and that anyone quoting a precise share is repeating something they did not verify.