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 )