| name | Annual visitors | Area (m²) | date Opened | Country | continent | latitude (°) | longitude (°) | Number of animals | Number of species | Website | entity | city | administrative división | Map |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Denver Zoo | 1,600,000 | 320,000 | 1896 | United States | America | 39.7500000000 | -104.9499969482 | 3,699 | 641 | Website | 4, Association of Zoos and Aquariums | Denver | Colorado | Map |
| Saint Louis Zoo | 3,000,000 | 360,000 | 1904 | United States | America | 38.6333351135 | -90.2833328247 | 17,900 | 800 | Website | Association of Zoos and Aquariums | St. Louis | Missouri | Map |
| Houston Zoo | 2,550,000 | 220,000 | 09/1922 | United States | America | 29.7000007629 | -95.3833312988 | 4,500 | 900 | Website | Association of Zoos and Aquariums | Houston | Texas | Map |
| National Zoological Gardens of Sri Lanka | 1,500,000 | 100,000 | 1936 | Sri Lanka | Asia | 6.8499999046 | 79.8666687012 | 3,000 | 350 | Website | World Association of Zoos and Aquariums | Dehiwala-Mount Lavinia | Western | Map |
| La Palmyre Zoo | 750,000 | 180,000 | 1966 | France | Europe | 45.6833343506 | -1.1666666269 | 1,500 | 115 | Website | Les Mathes | Nouvelle-Aquitaine | Map |