| 1 | San Diego Zoo | 🇺🇸 United States | In captivity |
| 2 | National Zoological Park | 🇺🇸 United States | In captivity |
| 3 | Cincinnati Zoo and Botanical Garden | 🇺🇸 United States | In captivity |
| 4 | Aquarium of Genoa | 🇮🇹 Italy | In captivity |
| 5 | California Academy of Sciences | 🇺🇸 United States | In captivity |
| 6 | Lisbon Oceanarium | 🇵🇹 Portugal | In captivity |
| 7 | North Carolina Zoo | 🇺🇸 United States | In captivity |
| 8 | Australia Zoo | 🇦🇺 Australia | In captivity |
| 9 | Cabarceno Natural Park | 🇪🇸 Spain | In captivity |
| 10 | Kolmården Wildlife Park | 🇸🇪 Sweden | In captivity |
| 11 | Zoo Pilsen | 🇨🇿 Czechia | In captivity |
| 12 | Greensboro Science Center | 🇺🇸 United States | In captivity |
| 13 | San Diego Zoo Safari Park | 🇺🇸 United States | In captivity |
| 14 | Toronto Zoo | 🇨🇦 Canada | In captivity |
| 15 | Taipei Zoo | 🇹🇼 Taiwan | In captivity |
| 16 | Living Desert Zoo and Gardens | 🇺🇸 United States | In captivity |
| 17 | Columbus Zoo and Aquarium | 🇺🇸 United States | In captivity |
| 18 | Bronx Zoo | 🇺🇸 United States | In captivity |
| 19 | Brookfield Zoo | 🇺🇸 United States | In captivity |
| 20 | Ecological Center of Sonora | 🇲🇽 Mexico | In captivity |
| 21 | Nashville Zoo at Grassmere | 🇺🇸 United States | In captivity |
| 22 | Safari Madrid | 🇪🇸 Spain | In captivity |
| 23 | 西霞口神雕山野生動物世界 | 🇨🇳 China | In captivity |
| 24 | Sedgwick County Zoo | 🇺🇸 United States | In captivity |
| 25 | Milwaukee County Zoo | 🇺🇸 United States | In captivity |
| 26 | Los Angeles Zoo | 🇺🇸 United States | In captivity |
| 27 | Bearizona | 🇺🇸 United States | In captivity |
| 28 | Oakland Zoo | 🇺🇸 United States | In captivity |
| 29 | Parque Zoológico de León - Zooleón | 🇲🇽 Mexico | In captivity |
| 30 | Dallas Zoo | 🇺🇸 United States | In captivity |
| 31 | National Zoological Garden of South Africa | 🇿🇦 South Africa | In captivity |
| 32 | Phoenix Zoo | 🇺🇸 United States | In captivity |
| 33 | Toledo Zoo | 🇺🇸 United States | In captivity |
| 34 | Cape May County Park & Zoo | 🇺🇸 United States | In captivity |
| 35 | Wildlife World Zoo | 🇺🇸 United States | In captivity |
| 36 | Flamingo Land Resort | 🇬🇧 United Kingdom | In captivity |
| 37 | Africam Safari | 🇲🇽 Mexico | In captivity |
| 38 | Bear Country USA | 🇺🇸 United States | In captivity |
| 39 | Guadalajara Zoo | 🇲🇽 Mexico | In captivity |
| 40 | Noah's Ark Zoo Farm | 🇬🇧 United Kingdom | In captivity |
| 41 | Oklahoma City Zoo and Botanical Garden | 🇺🇸 United States | In captivity |
| 42 | ABQ BioPark: Zoo, Aquarium, Botanic Garden | 🇺🇸 United States | In captivity |
| 43 | Burgers' Ocean | 🇳🇱 Netherlands | In captivity |
| 44 | Caldwell Zoo | 🇺🇸 United States | In captivity |
| 45 | Dickerson Park Zoo | 🇺🇸 United States | In captivity |
| 46 | Indianapolis Zoo | 🇺🇸 United States | In captivity |
| 47 | Zoo Knoxville | 🇺🇸 United States | In captivity |
| 48 | Lisbon Zoo | 🇵🇹 Portugal | In captivity |
| 49 | Taronga Zoo | 🇦🇺 Australia | In captivity |
| 50 | Zoológico Benito Juárez | 🇲🇽 Mexico | In captivity |
Gila Monster 
