We ranked the ten biggest swimming pools in the world strictly by water surface area, and counted only pools that are filled and swum in today — a rule that quietly disqualifies the one most lists put at number one. Eight of the ten are Crystal Lagoons-style swimming lagoons rather than conventional pools, because past about five acres that is the only way anyone builds them any more. We have also flagged who can actually get into each one, since for most of this top ten the honest answer is "residents only".
10 Biggest Swimming Pools in the World (2026)
The record The biggest swimming pool in the world is the Crystal Lagoon at District One, in the United Arab Emirates — 46.2 acres (18.7 hectares), water surface area. Source: Crystal Lagoons project record; corroborated by OpenStreetMap relation 9070591 (19.26 ha net of islands). Verified .
Biggest Swimming Pools in the World The Ranking at a Glance
Fun Facts About the World's Biggest Swimming Pools
- The biggest swimmable water on Earth is in the desert — the 46.2-acre Crystal Lagoon at District One sits in the middle of Dubai, and it is nearly twice the size of the runner-up.
- The world's most famous "largest pool" has never had a swimmer in it. Citystars Sharm El Sheikh in Egypt is filled and maintained, but its resort has never opened — satellite images show a full turquoise lagoon beside a completely empty beach.
- Guinness has retired the "largest swimming pool by area" record entirely. Its page still names the Orthlieb Pool in Casablanca, which was demolished in 1986 to clear the site for the Hassan II Mosque.
- Only two of the ten biggest sell tickets to the public — the Lagoon at Mirada in Florida and Lago Mar in Texas. Everything else is gated behind a house, a hotel room or a membership.
- The record moves fast. Cotino Bay in California opened in October 2025 at 24.7 acres and instantly took the Americas title off Florida's Mirada, which had held it since 2023.
1. Crystal Lagoon at District One
At 46.2 acres of turquoise water, the Crystal Lagoon at District One is the biggest swimmable man-made lagoon on the planet — close to double the size of anything else that has ever been filled. It sits in the middle of Mohammed Bin Rashid City, minutes from downtown Dubai, and has held water since 2017. Residents swim, kayak and paddleboard on it year-round, along a shoreline long enough that you lose sight of where you started.
Two things are worth knowing. The lagoon you can swim in is not the one in the brochures: the marketing has promised a 40-hectare, seven-kilometre waterway "upon completion" since 2013, and that stretch is still sand. And it is a private amenity — District One residents and their invited guests only, with no day passes and no public gate.
2. Cotino Bay
At 24.7 acres, Cotino Bay is the largest man-made swimming lagoon in the Americas and the second largest anywhere on Earth. It is the centrepiece of Cotino, the Storyliving by Disney community in Rancho Mirage, California, and it opened at the end of October 2025 — making it the newest entry here by a wide margin, and the reason most "biggest pools" lists still do not mention it at all.
Swimming is not included with a house. Disney is explicit that buying a home "does not grant access to Cotino Bay or its beaches"; that needs a separate Artisan Club membership on top of the mortgage. Ticketed access for visitors is tied to the community's town centre, scheduled to open in autumn 2026 — so for now this is a residents-and-members lagoon sitting in the Coachella Valley desert.
3. San Alfonso del Mar
At 19.8 acres and just over a kilometre from end to end, San Alfonso del Mar in Algarrobo is the pool that made giant lagoons famous. Guinness certified it as the world's largest swimming pool when it was completed in December 2006, and for a decade no article about oversized pools ran without its photograph. It holds filtered seawater pumped straight from the Pacific, which breaks on a beach a few metres beyond its far wall.
It is still very much alive: the resort hosted a 2,500-metre open-water swim staged entirely inside the lagoon in April 2026, which is about as direct a proof of a working pool as anyone could ask for. One caveat worth carrying — Guinness has since retired the "largest swimming pool by area" category altogether, so the 2006 certification is a historical record rather than a title it still holds.
4. MahaSamutr
At roughly 15.6 acres, MahaSamutr near Hua Hin is the largest crystal lagoon in Thailand and the biggest in mainland Asia. Satellite measurement puts its water at about 6.3 hectares, a little under the round 45-rai figure the developer has always quoted, and it runs more than 800 metres alongside a villa estate two hours south of Bangkok.
It is the most closed-off water on this list. MahaSamutr is a members-only country club that says it "only welcome[s] members who are registered and enrolled with us", with membership once starting at 500,000 baht. Its developer went through court-supervised rehabilitation and was delisted from the Thai exchange in 2024, and the club's own website stopped publishing news in 2017 — yet satellite passes through June 2026 still show the lagoon full and treated turquoise, so someone is clearly paying to keep it that way.
5. Treasure Bay Bintan
At 14.9 acres, the Crystal Lagoon at Treasure Bay Bintan is the largest in Southeast Asia, and the biggest one here that any traveller can reach by simply booking a room. It sits on the north coast of Bintan, an hour by ferry from Singapore, and its operators like to describe it as roughly the size of fifty Olympic pools — which, at 6.03 hectares, checks out.
Swimming is complimentary for resort guests, and the lagoon doubles as a watersports playground: paddleboards, kayaks and a jetovator all run on it, daily from 9am to 6pm. It is effectively tied with the Lagoon at Mirada in Florida — both are recorded at 6.03 hectares, and the gap between them is smaller than the rounding on either figure.
6. The Lagoon at Mirada
At 14.9 acres, the Lagoon at Mirada in San Antonio, Florida is the largest man-made lagoon in the world that you can walk up to and buy a ticket for. It holds 33 million gallons, its shoreline runs close to a mile, and at 6.03 hectares it is tied with Treasure Bay Bintan to within a rounding error.
Day passes start around $20 and are genuinely sold to non-residents, which makes it an outlier: nearly everything ranked above it is gated behind a house, a hotel room or a club. One correction, though — Mirada is still widely billed as the largest lagoon in America, and that stopped being true in October 2025 when Cotino Bay opened in California at 24.7 acres. It also holds no Guinness record, whatever the press releases imply.
7. La Jolla de Asia
At 13.6 acres, La Jolla de Asia is the largest crystal lagoon in Peru and one of the biggest on South America's Pacific coast. It runs roughly 850 metres through a gated condominium in Asia — the summer beach strip a couple of hours south of Lima where limeños decamp between December and April.
Its water surface is published as 5.5 hectares with 25,000 square metres of beach counted separately, which is unusually honest arithmetic for this industry: independent measurement lands within about 2% of the developer's own number. The lagoon was filled in February 2012, and it is strictly private — owners, their families and invited guests, with purchases vetted by a screening board.
8. Terralagos
At 12.9 acres, Terralagos in Canning was the first crystal lagoon built anywhere in Argentina, and it is still the country's largest. It opened in March 2015 in a gated barrio about 40 kilometres south of Buenos Aires, and its S-shaped water sits among four ordinary landscape lakes — a contrast that makes the treated turquoise unmistakable from the air.
One of its developers confirmed in May 2026 that the lagoon is "funcionando" and suitable for swimming and watersports, and satellite passes in late June 2026 show it fully filled in the depths of the southern winter. Roughly 1,100 owner families have access to it; as with most of the lagoons ranked above, there is no way in from the outside.
9. Lago Mar
At 11.5 acres, Lago Mar in Texas City is the largest crystal lagoon in Texas and one of only two on this list that sells tickets to anyone who wants one. It opened in 2020 roughly halfway between Houston and Galveston, and it trades as Lagoonfest Texas, with day passes around $25.
2026 has been a rough year for it. The lagoon sat drained from October 2025 until around April 2026 while a failed liner was replaced, with the developer apologising publicly for how long the multimillion-dollar repair dragged on. It reopened for Summerfest on 4 July 2026, but with daily capacity capped at 500 guests and a reduced lagoon footprint — so it is worth checking before making the drive.
10. Diamante Cabo San Lucas
At 9.9 acres, the crystal lagoon at Diamante Cabo San Lucas is the largest in Mexico and the tenth largest on Earth. It opened in 2013 on the Pacific side of the Baja peninsula, inside a golf resort better known for its Dunes course, and it was among the earliest Crystal Lagoons projects built outside Chile.
Access runs through the property: it is a private community for owners and members, though rental guests staying three nights or more are granted amenity access as well. Worth knowing that every "10-acre" figure written about it traces back to the same press release — independent measurement actually puts the water slightly larger, at about 4.3 hectares.
FAQ: The World's Biggest Swimming Pools
What is the biggest swimming pool in the world?
The Crystal Lagoon at District One in Dubai is the biggest swimmable man-made pool in the world, at about 46.2 acres 18.7 hectares of water. It is a private amenity for residents of Mohammed Bin Rashid City and their guests, which is why it rarely appears on published lists despite being nearly twice the size of the runner-up.
Is Citystars Sharm El Sheikh still the world's largest swimming pool?
No, and in practical terms it never really was one. The Egyptian lagoon is around 24 acres and is still filled and maintained, but the resort around it has never opened to guests — recent satellite imagery shows treated water beside an entirely empty beach, and the Fairmont hotel there is now targeting an opening around 2027. Guinness no longer credits it with any record either.
What is the largest swimming pool in the United States?
Cotino Bay in Rancho Mirage, California, at 24.7 acres. It opened in late October 2025 as part of Disney's Storyliving community and took the title from the Lagoon at Mirada in Florida. Access currently requires a Cotino home plus a separate Artisan Club membership; ticketed visitor access is tied to the town centre due in autumn 2026.
What is the largest man-made lagoon in the world?
Guinness recognises the Lagoon Lake at Boulevard World in Riyadh, Saudi Arabia, at 12.19 hectares 30.13 acres, set in November 2022. It does not appear on this list because nobody swims in it — it is a boating lake, used for feluccas, gondolas and amphibious cars, and it operates seasonally as part of Riyadh Season.
Can you actually swim in the world's biggest swimming pools?
Mostly not. Of the ten biggest, only the Lagoon at Mirada in Florida and Lago Mar in Texas sell day passes to the general public. Treasure Bay Bintan in Indonesia and San Alfonso del Mar in Chile are open to resort guests, and the rest — including the top two — are private amenities restricted to residents, owners or club members.
Does San Alfonso del Mar still hold the world record?
Not any more. The Chilean lagoon was certified by Guinness as the world's largest swimming pool after it was completed in December 2006, at 19.8 acres, and it is still operating — it hosted an open-water swim inside the lagoon in April 2026. But Guinness has since retired that record category, and several larger lagoons have been built since, so its title is historical.
Is the Seagaia Ocean Dome in Japan still open?
No. The famous indoor beach and wave pool in Miyazaki shut in 2007 and the structure was demolished in 2017, so it cannot appear on a list of pools operating today. It was also much smaller than it looked: the often-quoted 300 by 100 metre measurement is the dome's footprint, while the water itself was only around 1.9 acres.
What is the biggest public swimming pool in the world?
Among conventional municipal pools, Freibad Fürstenfeld in Austria is the largest at about 5.7 acres (23,000 m²) of water. If man-made swimming lagoons count, the Lagoon at Mirada in Florida is the biggest that anyone can buy a ticket for, at 14.9 acres.
Planning more of your trip? Keep exploring more world record-breakers.