Naturism and nudism both mean social nudity practiced in a non-sexual setting, and in the United States the two words are used interchangeably. The difference is emphasis: nudism describes the practice, naturism describes the philosophy behind it, and the people who use "naturist" usually mean that being undressed is part of a wider attitude toward nature, health and other people.
Two words, one movement
"Nudism" is the older English word and the one most Americans reach for first. "Naturism" came into English from the French naturisme and the German Freikörperkultur, and in Britain it has largely replaced nudism because it sounds less like a hobby and more like a way of life. In Europe you will see "naturist beach," "FKK-Strand" or "plage naturiste" on the signs; in the United States you will see "nudist resort" and "clothing-optional beach" far more often. The organizations reflect the split: the American Association for Nude Recreation uses "nude recreation," the International Naturist Federation and British Naturism use "naturism," and The Naturist Society in Wisconsin chose "naturist" on purpose when it was founded in 1980.
Where it came from
The movement is German. It grew out of Lebensreform, the late nineteenth century "life reform" current that promoted fresh air, vegetarian food, sunlight and exercise as cures for industrial city living. Heinrich Pudor coined the word Nacktkultur ("naked culture") around 1902 and published a three-volume treatise in 1906; Richard Ungewitter's books Die Nacktheit (1906) and Nackt (1908) sold widely. The first large nudist park, Freilichtpark, opened near Hamburg in 1903 under Paul Zimmermann, and in 1920 Germany opened its first official nude beach at Kampen on the island of Sylt. By the mid-1920s the movement had the name it still carries, Freikörperkultur, or FKK.
The Nazi government restricted mixed nudism in 1933 and 1934, then relaxed the rules during the war. After 1945 the two Germanys went different ways: West German naturism organized itself into clubs, while in East Germany it lived on the beaches, where it became an ordinary part of a Baltic summer. That history is why Germany still has more marked FKK beaches than any other country, and why our guide to Europe's best nude beaches starts there.
The American story
Social nudism crossed the Atlantic with German immigrants. Kurt Barthel led a nude picnic in the Hudson Valley on Labor Day 1929 and opened the first American club near Spring Valley, New York, in June 1930. The organization that grew from it, under Ilsley Boone, became the American Sunbathing Association and, in 1995, the American Association for Nude Recreation, which celebrates 1931 as its founding year. AANR is still the body that affiliates most of the clubs and resorts you will find in the resort directory.
The second American organization is The Naturist Society, founded in 1980 by Lee Baxandall in Oshkosh, Wisconsin. Where AANR grew up around private clubs, TNS grew up around free beaches: Baxandall had spent the 1970s documenting clothing-optional beaches and campaigning for them, and his society's political arm, the Naturist Action Committee, still lobbies for beach access. If you use a public nude beach in the United States today, Haulover, Gunnison or Black's, you are standing on work that generation did.
The international definition
The national federations formed the International Naturist Federation (INF-FNI) at Montalivet in France; the INF dates its founding statutes to the world congress there in August 1953. At its 1974 congress in Agde the INF adopted the definition that every naturist organization still quotes: naturism is "a way of life in harmony with nature characterised by the practice of communal nudity with the intention of encouraging self-respect, respect for others and for the environment."
That sentence does three jobs. It says nudity is communal, not solitary. It says the point is respect, which is why staring, photography and sexual behavior are ruled out. And it links the practice to nature, which is why naturists care so much about the beaches, lakes and forests where they go.
Why naturism is non-sexual
This is the question every newcomer has and the one long-time naturists are most tired of answering, so here is the plain version. Naturism separates nudity from sex on purpose. The body is treated as ordinary: something you swim in, eat lunch in and play volleyball in, not something you display or inspect. Resorts and naturist beaches enforce that rule because it is what makes the setting safe for everyone, including families, who have been part of naturism since the 1920s. The practical signs of the rule are the ones our nude beach etiquette guide lists: towels under you, eyes up, no cameras, space from strangers.
A resort or beach where sexual activity is tolerated is not a naturist venue, whatever it calls itself. Our guide to clothing-optional and lifestyle resorts explains how to tell the difference from a listing before you book.
What "naturist" means today
Most people who call themselves naturists in 2026 are not members of anything. They go to a beach a few times a summer, a resort on vacation, or they simply do not wear clothes at home. The organized movement is older and smaller than it was, but the beaches are busier than ever, and the word has widened to include everyone who is comfortable undressed and expects the same ordinary respect they give to others.
If that is you, the community is here: members near you, local groups that organize beach days and resort visits, and the forum, where the naturism-versus-nudism debate has run for years and will happily run a little longer with you in it.