The adult internet is often described as a collection of countless niches, categories and subcultures. That is true, but the enormous number of available categories can make one question surprisingly difficult to answer: What is actually the most popular porn niche on the internet? The answer depends on what we mean by popular . Are we talking about the most searched keyword, the most viewed category, the fastest-growing niche, the most popular niche among men or women, or the niche with the greatest commercial potential? Those measurements can produce different answers. The most comprehensive publicly available recent snapshot comes from Pornhub's 2025 Year in Review , which analyzes activity on its own platform. According to that report, Lesbian was the most-viewed category globally in 2025 , while Hentai was the most-searched term for the fifth consecutive year . MILF remained one of the strongest categories and search terms, while Transgender rose substantially and became the ...