Rank Swimming Pool Country City Area Opened Water Notes Coordinates 1 Citystars Sharm El Sheikh Egypt Sharm El Sheikh 96,800 m 2 (1,042,000 sq ft) [ 1] See Note.2015 Sea water 28°1′41.2″N 34°23′38.7″E / 28.028111°N 34.394083°E / 28.028111; 34.394083 (City Stars Pool ) 2 San Alfonso del Mar Chile Algarrobo 80,000 m 2 (860,000 sq ft) [ 2] 2006 Sea water 33°21′2.68″S 71°39′11.81″W / 33.3507444°S 71.6532806°W / -33.3507444; -71.6532806 (City Stars Pool ) 3 Mahasamutr Thailand Hua Hin 72,000 m 2 (780,000 sq ft) [ 3] 2014 Sea water 12°31′20.6″N 99°56′16.6″E / 12.522389°N 99.937944°E / 12.522389; 99.937944 (Mahasamutr ) 4 Treasure Bay Bintan Indonesia Bintan 63,000 m 2 (680,000 sq ft) [ 4] 2015 Sea water 5 The Lagoon at Epperson USA Wesley Chapel 30,540.9 m 2 (328,739 sq ft) [ 5] 2017 Sea water 28°16′22″N 82°17′28″W / 28.2727°N 82.2910°W / 28.2727; -82.2910 6 Balneario Carlos Xamena Argentina Salta 26,199 m 2 (282,000 sq ft) [ 6] Fresh water 24°48′48.48″S 65°25′4.08″W / 24.8134667°S 65.4178000°W / -24.8134667; -65.4178000 (Balneario Carlos Xamena ) 7 Freibad Fürstenfeld Austria Fürstenfeld 23,000 m 2 (250,000 sq ft) [ 7] 1966 Fresh water
47°03'23.2"N 16°04'06.8"E 8 The Lagoon at Windsong Ranch USA Prosper, Texas 23,230 m 2 (250,000 sq ft) 33.23554, -96.86658 9 Laguna Las Brisas De Santo Domingo Chile Santo Domingo 22,000 m 2 (240,000 sq ft) [ 8] Sea water 33°41′36.4″S 71°39′4.7″W / 33.693444°S 71.651306°W / -33.693444; -71.651306 (Piscina Las Brisas ) 10 Peninsula Romania Cicarlau 18,000 m 2 (193,750 sq ft) 2021 Fresh water 11 Rabat municipal pool Morocco Rabat 17,000 m 2 (182,986 sq ft) 2020 Sea Water X4R6+7X9, Rabat 12 Freibad Weyermannshaus Switzerland Bern 16,000 m 2 (170,000 sq ft) [ 9] 1908 Fresh water 46°56′51.7″N 7°24′18.8″E / 46.947694°N 7.405222°E / 46.947694; 7.405222 (Weyermannshaus ) 13 Brentanobad Germany Frankfurt 11,000 m 2 (118,403 sq ft) [ 10] 1966 Fresh water 50°7′33.941″N 8°37′8.592″E / 50.12609472°N 8.61905333°E / 50.12609472; 8.61905333 (Brentanobad ) 14 Dreamworld Resort Pakistan Karachi 8,903.1 m 2 (95,832 sq ft) [ 11] 2008 Well water 25°1′56.5″N 67°8′29.3″E / 25.032361°N 67.141472°E / 25.032361; 67.141472 (Dreamworld ) 15 Hard Rock Guitar Hotel USA Hollywood, Florida 8,410 m 2 (90,500 sq ft) 2019 Fresh water 26°03′06.09″N 80°12′33.51″W / 26.0516917°N 80.2093083°W / 26.0516917; -80.2093083 (Hard Rock Guitar Lagoon Pool ) 16 Nakache été France Toulouse 7,500 m 2 (81,000 sq ft) [ 12] [ 13] 1933 Fresh water 43°35′8.85″N 1°26′7.61″E / 43.5857917°N 1.4354472°E / 43.5857917; 1.4354472 17 Sunlite Pool USA Cincinnati 7,450 m 2 (80,200 sq ft) 1925 Fresh water 39°03′17.20″N 84°25′03.02″W / 39.0547778°N 84.4175056°W / 39.0547778; -84.4175056 (Sunlite Pool ) 18 Bronte Creek Provincial Park Canada Oakville, Ontario 7,300 m 2 (79,000 sq ft) [ 14] 1972 Fresh water 43°24′12″N 79°45′30″W / 43.4032341°N 79.7582572°W / 43.4032341; -79.7582572 19 Freibad Waschmühle Germany Kaiserslautern 7,200 m 2 (78,000 sq ft) [ 15] 1908 49°27'37"N 7°45'46"E 20 Balmorhea State Park USA Balmorhea 7,158.5 m 2 (77,053 sq ft) [ 16] 1930s [ 17] Fresh water 30°56′40″N 103°47′00″W / 30.94444°N 103.78333°W / 30.94444; -103.78333 [ 18] 21 Outdoor pool Riviéra Brno CZE Brno 6,510 m 2 (70,100 sq ft) } [ 19] 1920 [ 20] Municipal water world´s largest stainless steel pool [ 21] 49°11′9.55″N 16°34′20.98″E / 49.1859861°N 16.5724944°E / 49.1859861; 16.5724944 (Freibad Riviéra Brünn ) 22 Freibad Germany Ensdorf 6,250 m 2 (67,300 sq ft) Municipal water 49°18′40.5″N 6°47′18.79″E / 49.311250°N 6.7885528°E / 49.311250; 6.7885528 (Freibad Ensdorf ) 23 Hansen Dam Recreation Center USA Los Angeles 6,100 m 2 (65,000 sq ft) [ 22] [ 23] 1998 [ 22] Municipal water 34°16′13.9″N 118°23′20.9″W / 34.270528°N 118.389139°W / 34.270528; -118.389139 (Hansen Dam ) 24 Lymington Sea Water Baths UK Lymington 5,500 m2 1833 Sea Water 50°45′10.08″N 1°31′41.52″W
25 North Park Pool USA Pittsburgh 5,365 m 2 (57,748 sq ft) [ 24] 1937 [ 24] Municipal water 2,250,000 gal. 40° 35' 19.6002"N79° 59' 41.6466"W 26 Oak Ridge Outdoor Pool USA Oak Ridge 5,100 m 2 (54,000 sq ft) [ 25] 1944 [ 26] Fresh water 36°00′58″N 84°15′57″W / 36.0160°N 84.2658°W / 36.0160; -84.2658 27 Astoria Park Pool USA New York City 5,059 m 2 (54,450 sq ft) [ 27] 1936 Fresh water 40°46′44″N 73°55′21″W / 40.7789°N 73.9224°W / 40.7789; -73.9224 28 Pearce Pool USA Jackson 4,394.7 m 2 (47,304 sq ft) [ 28] 1960s [ 29] Fresh water 31°30′10″N 87°53′18″W / 31.5029°N 87.8884°W / 31.5029; -87.8884 (Pearce Pool ) 29 Europasportpark Germany Berlin 3,391 m 2 (36,500 sq ft) [ 30] 1999 Municipal water 52°31′47″N 13°27′14″E / 52.52966°N 13.45384°E / 52.52966; 13.45384 30 Tooting Bec Lido UK London 2,800 m 2 (30,000 sq ft) [ 31] 1906 Fresh water 51° 25′ 54″ N, 0° 8′ 21″ W 31 Budlong Pool USA Cranston, Rhode Island 2,029 m 2 (21,840 sq ft) [ 32] 1950s Municipal water 32 Neutral Buoyancy Laboratory USA Houston 1,914.2 m 2 (20,604 sq ft) [ 33] 1995 29°36′25.4″N 95°8′36.8″W / 29.607056°N 95.143556°W / 29.607056; -95.143556 (Neutral Buoyancy Laboratory )