| 1 | Zoological Society Of San Diego | USA | San Diego | 2920 Zoo Dr | San Diego | 92101 | zoo.***** | 1916 | $411,019,877 | 2,300 | N/A | N/A | 0083432 |
| 2 | Wildlife Conservation Society | USA | Bronx | 2300 Southern Blvd | Bronx | 10460 | wcs.***** | 1895 | $345,503,315 | 4,000 | N/A | N/A | 152 |
| 3 | Aqua Zoo Friesland Exploitatie B.V. | Netherlands | Leeuwarden | De Groene Ster 2 | Friesland | 8926 XE | aquazoo.***** | 2015 | $202,612,030 | 18 | N/A | N/A | 62684574 |
| 4 | Dierenpark Overloon Exploitatie B.V. | Netherlands | Boxmeer | Stevensbeekseweg 21 | Noord-brabant | 5825 JB | zooparc.***** | 2015 | $202,612,030 | 23 | N/A | N/A | 62684493 |
| 5 | Eindhoven Zoo Exploitatie B.V. | Netherlands | Geldrop | Heiderschoor 24 | Noord-brabant | 5731 RG | dierenrijk.***** | 2003 | $202,612,030 | 24 | N/A | N/A | 17148216 |
| 6 | Sprava Narodneho Parku Velka Fatra So Sídlom V Martine | Slovakia | Martin | P. O. Hviezdoslava 73/38 | Žilina | 03 601 | N/A | 2022 | $158,507,109 | 38 | N/A | N/A | 54435366 |
| 7 | The Monterey Bay Aquarium Foundation | USA | Monterey | 886 Cannery Row | Monterey | 93940 | montereybayaquarium.***** | 1978 | $155,905,897 | 380 | N/A | N/A | 0843295 |
| 8 | Georgia Aquarium, INC. | USA | Atlanta | 225 Baker St Nw | Fulton | 30313 | georgiaaquarium.***** | 2000 | $154,015,989 | 410 | N/A | N/A | 582574918 |
| 9 | Loro Parque SA | Spain | Puerto de la Cruz | Avenida Loro Parque, S/n | Santa Cruz de Tenerife | 38400 | loroparque.***** | 1972 | $138,918,867 | 399 | N/A | N/A | A38009023 |
| 10 | Zoological Society Of Cincinnati | USA | Cincinnati | 3400 Vine St | Hamilton | 45220 | cincinnatizoo.***** | 1875 | $119,557,573 | 320 | N/A | N/A | 150228 |
| 11 | Enoshima Marine CORPORATION | Japan | Chiyoda-ku | 1-7-1, Yurakucho | Tōkyō | 100-0006 | N/A | 1952 | $114,021,548 | 308 | N/A | N/A | 7010001011591 |
| 12 | Zoo Parc De Beauval | France | Saint-aignan | Beauval | Loir-et-cher | 41110 | zooparcdebeauval.***** | 1991 | $108,318,303 | 887 | N/A | N/A | 38357843200015 |
| 13 | Zhuhai Changlong Marine World CO., LTD. | China | Zhuhai | G13, Fuxiang Bay Chimelong Office, Hengqin New District | Guangdong | 519031 | N/A | 2016 | $103,502,275 | 1,145 | N/A | N/A | 440003000173849 |
| 14 | Zoological Parks And Gardens Board | Australia | Kyabram | 75 Lake Road | Victoria | 3620 | N/A | 1973 | $99,642,851 | 618 | N/A | N/A | 96913959053 |
| 15 | Chicago Zoological Society INC | USA | Brookfield | 3300 Golf Rd 653 | Lasalle | 60513 | czs.***** | 1921 | $94,260,071 | 500 | N/A | N/A | 15858630 |
| 16 | Lijiang Shuhe Ancient Town Comprehensive Service CO., LTD. | China | Lijiang | Tianyu Yangguang Sanqi Huisuo, Shuhegu Town, Gucheng District | Yunnan | 674100 | N/A | 2016 | $92,202,900 | 1,020 | N/A | N/A | 530702000051110 |
| 17 | Yokohama Hakkeijima INC. | Japan | Yokohama | Hakkeijima, Kanazawa-ku | Kanagawa | 236-0006 | N/A | 1990 | $89,431,216 | 653 | N/A | N/A | 6020001006906 |
| 18 | The Columbus Zoological Park Association | USA | Powell | 4850 Powell Rd | Delaware | 43065 | columbuszoo.***** | 1930 | $87,290,299 | 200 | N/A | N/A | 140473 |
| 19 | Gardens By The Bay | Singapore | Singapore | 18 Marina Gardens Drive | Singapore | 018953 | gardensbythebay.***** | 2011 | $87,159,022 | 146 | N/A | N/A | 201132829N |
| 20 | The New York Botanical Garden | USA | Bronx | 2900 Southern Blvd | Bronx | 10458 | nybg.***** | 1891 | $87,150,788 | 500 | N/A | N/A | 96 |
| 21 | Costa Edutainment SPA | Italy | Genova | Ponte Degli Spinola | Genova | 16128 | acquariodigenova.***** | 1992 | $86,245,014 | 399 | N/A | N/A | IT03362540100 |
| 22 | California Academy Of Sciences | USA | San Francisco | 55 Music Concourse Dr | San Francisco | 94118 | calacademy.***** | 1853 | $84,714,299 | 655 | N/A | N/A | 0040179 |
| 23 | Houston Zoo, INC. | USA | Houston | 6200 Hermann Park Dr | Harris | 77030 | houstonzoo.***** | 1967 | $82,522,000 | 750 | N/A | N/A | 0023110601 |
| 24 | Zoo Zurich AG | Switzerland | Zurich | Zurichbergstrasse 221 | Zürich | 8044 | zoo.***** | 1928 | $80,710,556 | 165 | N/A | N/A | CHE-101.907.073 |
| 25 | North Of England Zoological Society (the) | Unitedkingdom | Bache | Cedar House | Cheshire West and Chester | CH2 1LH | chesterzoo.***** | 1934 | $80,033,835 | 954 | N/A | N/A | 00287902 |
| 26 | Avanqua Oceanografic SL. | Spain | València | Calle Gran Via del Marques del Turia 19 | Valencia | 46005 | oceanografic.***** | 2015 | $79,028,630 | 580 | N/A | N/A | B98725252 |
| 27 | Foundation For The Parks And Reserves Of Cote D'ivoire (fprci-Uk) | Unitedkingdom | Clapton | C/o Sedulo London | London | EC1V 9DD | N/A | 2010 | $77,228,110 | 2 | N/A | N/A | 07057365 |
| 28 | Chicago Horticultural Society | USA | Glencoe | 1000 Lake Cook Rd | Cook | 60022 | chicagobotanic.***** | 1890 | $76,930,745 | 240 | N/A | N/A | 05234816 |
| 29 | Wcs, INC. | USA | Colorado Springs | 1515 N Academy Blvd Ste 400 | El Paso | 80909 | wcs.***** | 1985 | $74,096,540 | 2,800 | N/A | N/A | 19871607404 |
| 30 | Societe Zoologique De Granby INC | Canada | Granby | 525 Rue Saint-hubert | Québec | J2G 5P3 | zoodegranby.***** | 1953 | $73,373,300 | 550 | N/A | N/A | N/A |
| 31 | Kaiyukan, K.K. | Japan | Osaka | 1-1-10, Kaigandoori, Minato-ku | Ōsaka | 552-0022 | N/A | 1988 | $70,537,638 | 315 | N/A | N/A | 4120001030105 |
| 32 | Dalian Sunasia Tourism Holding CO.,LTD | China | Dalian | No.608-6-8, Zhongshan Rd., Shahekou Dist. | Liaoning | 116023 | N/A | 1994 | $69,731,985 | 689 | N/A | N/A | 210200400029365 |
| 33 | Shedd Aquarium Society | USA | Chicago | 1200 S Lake Shore Dr | Cook | 60605 | sheddaquarium.***** | 1924 | $69,039,723 | 287 | N/A | N/A | 17398636 |
| 34 | Royal Botanic Gardens And Domain Trust | Australia | Sydney | Mrs Macquaries Rd | New South Wales | 2000 | rbgsyd.***** | 1816 | $66,510,395 | 288 | N/A | N/A | 22988772206 |
| 35 | New England Aquarium CORP | USA | Boston | 1 Central Wharf | Suffolk | 02110 | neaq.***** | 1957 | $65,384,755 | 350 | N/A | N/A | 042297514 |
| 36 | The Atlanta Botanical Garden INC | USA | Atlanta | 1345 Piedmont Ave Ne | Fulton | 30309 | atlantabotanicalgarden.***** | 1978 | $65,291,518 | 60 | N/A | N/A | H809586 |
| 37 | San Antonio Zoological Society | USA | San Antonio | 3903 N Saint Marys St | Bexar | 78212 | sazoo.***** | 1929 | $63,772,522 | 275 | N/A | N/A | 0005297101 |
| 38 | The Saint Louis Zoo Association | USA | Saint Louis | 1 Government Dr | St. Louis City | 63110 | stlzoo.***** | 1904 | $63,311,338 | 50 | N/A | N/A | N00053264 |
| 39 | Aquarium Of The Pacific | USA | Long Beach | 100 Aquarium Way | Los Angeles | 90802 | aquariumofpacific.***** | 1997 | $57,011,610 | 300 | N/A | N/A | 1845304 |
| 40 | Lincoln Park Zoological Society | USA | Chicago | 2001 N Clark St | Cook | 60614 | lpzoo.***** | 1959 | $56,439,039 | 175 | N/A | N/A | 362512404 |
| 41 | National Aquarium, INC. | USA | Baltimore | 501 E Pratt St | Baltimore City | 21202 | aqua.***** | 1981 | $55,641,673 | 350 | N/A | N/A | 521121163 |
| 42 | The Missouri Botanical Garden | USA | Saint Louis | 4344 Shaw Blvd | St. Louis City | 63110 | missouribotanicalgarden.***** | 1859 | $55,513,182 | 470 | N/A | N/A | 430666759 |
| 43 | The Seattle Aquarium | USA | Seattle | 1483 Alaskan Way Pier 59 | King | 98101 | seattleaquarium.***** | 1994 | $53,341,342 | 284 | N/A | N/A | N/A |
| 44 | The Fort Worth Zoological Association | USA | Fort Worth | 1989 Colonial Pkwy | Tarrant | 76110 | fortworthzoo.***** | 1950 | $53,079,471 | 250 | N/A | N/A | 0010465001 |
| 45 | Longwood Gardens, INC. | USA | Kennett Square | 1001 Longwood Rd | Chester | 19348 | longwoodgardens.***** | 1970 | $50,940,525 | 448 | N/A | N/A | 0758227 |
| 46 | Korea Institute Of Arboretum Management | Southkorea | Sejong | 3/f Sm Tower | Sejong Special Self-governing City | 30129 | N/A | 2017 | $50,806,398 | 438 | N/A | N/A | 2928200172 |
| 47 | Indianapolis Zoological Society, INC. | USA | Indianapolis | 1200 W Washington St | Marion | 46222 | indianapoliszoo.***** | 1944 | $50,063,288 | 215 | N/A | N/A | 351074747 |
| 48 | The Toledo Zoological Society | USA | Toledo | 2 Hippo Way | Lucas | 43609 | toledozoo.***** | 1981 | $47,461,864 | 450 | N/A | N/A | 105117 |
| 49 | Nashville Zoo INC. | USA | Nashville | 3777 Nolensville Pike | Davidson | 37211 | nashvillezoo.***** | 1990 | $47,398,988 | 100 | N/A | N/A | 000222320 |
| 50 | Jardin Botanique De Montreal | Canada | Montréal | 255-4101 Rue Sherbrooke E | Québec | H1X 2B2 | museumsnature.***** | 1991 | $47,187,000 | 450 | N/A | N/A | N/A |