America’s zoos are more than just animal exhibits – they’re sanctuaries that play a crucial role in conservation, education, and research. From coast to coast, the United States features some of the world’s most expansive and diverse zoological parks.
These living museums offer visitors a chance to connect with nature and serve as vital centers for protecting endangered species.
Here’s 13 of the largest zoos, which redefine wildlife preservation and education in the United States.
1. San Diego Zoo

Nestled in the heart of California, the San Diego Zoo is a testament to animal care and conservation innovation. Spanning 100 acres, this world-renowned facility is home to over 12,000 animals representing more than 650 species and subspecies.
The zoo’s commitment to creating naturalistic habitats is evident in its diverse exhibits, from the lush Panda Trek to the arid Urban Jungle. Visitors can marvel at rare creatures like the red panda and African elephant while learning about the zoo’s efforts in wildlife preservation.(ref)
2025 & 2026 Digital Planner Now 50% Off!
Note: This is an affiliate link and we may earn a small commission if you purchase at no additional cost. This helps keep our website free to use.
The San Diego Zoo’s Wildlife Alliance has made significant strides in population sustainability and genetic diversity research, earning recognition from the American Alliance of Museums.
2. Bronx Zoo
The Bronx Zoo, which spans 265 acres in New York City, is the largest metropolitan zoo in the United States. Established in 1899, this urban oasis houses over 6,000 animals representing more than 700 species from around the globe.
The Bronx Zoo’s commitment to conservation is evident in its diverse exhibits, which include the Congo Gorilla Forest and Tiger Mountain. Visitors can observe everything from majestic tigers and lions to more minor, equally fascinating creatures like lemurs and reptiles.
The zoo’s historical significance is underscored by its establishment of the first modern zoo animal hospital in 1916, which set a precedent for animal care in captivity.
Beaded Fidget Hedgehog Crochet Pattern
Note: This is an affiliate link and we may earn a small commission if you purchase at no additional cost. This helps keep our website free to use.
3. Columbus Zoo & Aquarium
Located just north of Columbus, Ohio, the Columbus Zoo and Aquarium is a 580-acre haven for approximately 5,000 animals representing over 600 species. This expansive facility has earned a reputation for its diverse collection and unwavering dedication to conservation, education, and research.
The zoo is divided into themed regions, including the Congo Expedition and Heart of Africa, each meticulously designed to mimic the natural habitats of its inhabitants. Visitors can witness cheetahs sprinting across vast savannahs or observe polar bears in the Shores & Aquarium section.
The Columbus Zoo’s leadership in breeding programs for endangered species, such as the African lion and Amur tiger, underscores its vital role in global conservation efforts.
4. Henry Doorly Zoo & Aquarium
Omaha, Nebraska, might seem an unlikely location for one of the world’s most renowned zoos, but the Henry Doorly Zoo and Aquarium defies expectations. This 160-acre facility is celebrated for its innovative exhibits and commitment to conservation.
Home to the world’s largest indoor desert and nocturnal exhibits, Henry Doorly offers visitors unique experiences like exploring the Lied Jungle, the largest indoor rainforest in North America.
The zoo’s dedication to research and breeding programs for endangered species has earned it international recognition, making it a crucial player in global conservation efforts.
5. Smithsonian’s National Zoo & Conservation Biology Institute
Spanning 163 acres in the heart of Washington, D.C., the Smithsonian’s National Zoo holds a special place in American zoological history. Established in 1889, it’s one of the oldest zoos in the country and home to over 2,000 animals representing 400 species.
The zoo’s focus on endangered species conservation is highlighted by its work with Sumatran tigers, a species nearly driven to extinction by poaching. Its famous panda webcam allows people worldwide to connect with these rare animals, fostering global awareness and support for conservation efforts.
As part of the Smithsonian Institution, this zoo serves as a wildlife sanctuary and a vital research center, contributing significantly to our understanding of animal behavior and conservation.
6. Pittsburgh Zoo & PPG Aquarium
Nestled in western Pennsylvania, the Pittsburgh Zoo & PPG Aquarium stands out as a beacon of conservation and education. Spanning 77 acres, this facility is home to thousands of animals, including rare and endangered species like Amur leopards, Komodo dragons, and red pandas.
What sets Pittsburgh Zoo apart is its commitment to interactive exhibits that captivate visitors of all ages. Children can enjoy close encounters with various critters, fostering a deep appreciation for wildlife.
The zoo’s burrowing animals exhibit, in particular, offers an enriching experience that allows young explorers to observe these fascinating creatures up close. With its diverse collection and educational programs, Pittsburgh Zoo continues to inspire the next generation of conservationists.
7. Minnesota Zoo
Sprawling across 505 acres in Apple Valley, Minnesota, the Minnesota Zoo has earned its reputation as one of America’s most innovative wildlife parks. This expansive facility is home to over 4,700 animals representing 505 species, making it a true haven for biodiversity.
The Minnesota Zoo’s commitment to conservation is evident in its award-winning exhibits and programs. Visitors can explore diverse habitats, from the tropical Tropics Trail to the northern Medtronic Minnesota Trail.
The zoo has unique programs like the Close Encounters series, which offers behind-the-scenes experiences with various animals. The Minnesota Zoo plays a crucial role in fostering public awareness about wildlife conservation by combining entertainment with education.
8. Brookfield Zoo
Located just outside Chicago, Illinois, the Brookfield Zoo covers an impressive 216 acres and houses approximately 2,000 animals from 450 species. Since opening in 1934, this zoo has been at the forefront of animal care and conservation efforts.
Brookfield Zoo is renowned for its naturalistic habitats, including the award-winning Tropic World, one of the largest indoor zoo exhibits in the world. The zoo’s commitment to conservation is evident in its participation in numerous Species Survival Plans to preserve endangered species.
Visitors can witness these efforts firsthand through exhibits like the Hamill Family Play Zoo, which encourage children to connect with nature through hands-on experiences.
9. Zoo Miami
As the largest zoo in Florida, Zoo Miami spans an incredible 750 acres, making it the largest zoo in the United States by land area. This tropical paradise is home to over 3,000 animals representing nearly 500 species, many of which are rare or endangered.
Zoo Miami’s unique climate allows it to house various animals from Asia, Australia, and Africa in open-air exhibits that closely mimic their natural habitats. The zoo’s commitment to conservation is evident in its participation in over 80 Species Survival Plans.
Visitors can explore diverse ecosystems, from the Amazon and Beyond exhibit to the Florida: Mission Everglades attraction, gaining a deeper understanding of global biodiversity and the importance of habitat preservation.
10. Dallas Zoo
Rounding out our list is the Dallas Zoo, a 106-acre oasis in the heart of Texas. As the oldest and largest zoological park in the Lone Star State, this institution has captivated visitors since 1888 with its diverse collection of over 2,000 animals representing more than 400 species.
The award-winning Giants of the Savanna exhibit highlights the Dallas Zoo’s commitment to conservation and education, which features elephants, giraffes, and other African species in a naturalistic, multi-species habitat. The zoo’s Lacerte Family Children’s Zoo offers interactive experiences that foster a love for wildlife in young visitors.
Through its various conservation programs and partnerships, the Dallas Zoo plays a vital role in protecting endangered species and educating the public about the importance of biodiversity.
11. Cleveland Metroparks Zoo
Nestled in the heart of Ohio, the Cleveland Metroparks Zoo spans an impressive 183 acres, making it one of the largest zoos in America. This expansive facility is home to over 3,000 animals representing more than 600 species, offering visitors a comprehensive look at global biodiversity.
What sets Cleveland Metroparks Zoo apart is its commitment to creating distinct zones that mimic animals’ natural habitats. From the Australian Adventure to the Northern Wilderness Trek, each area is carefully designed to provide optimal living conditions for its residents.
The zoo’s dedication to conservation is evident in its educational initiatives and care for endangered species like Aldabra Tortoises. With its diverse collection and focus on animal welfare, Cleveland Metroparks Zoo is a testament to modern zoological practices.
12. Cheyenne Mountain Zoo
Perched at 6,800 feet in Colorado Springs, the Cheyenne Mountain Zoo offers a unique wildlife experience against stunning mountain vistas. Covering 140 acres, this zoo is home to approximately 750 animals representing 150 species.
Cheyenne Mountain Zoo has earned its reputation through innovative exhibits and conservation commitment. Visitors can feed giraffes at eye level, observe grizzly bears in naturalistic habitats, and learn about the zoo’s efforts to protect endangered species.
The zoo’s participation in 30 Species Survival Plans underscores its vital role in global conservation efforts. With its unique location and dedication to wildlife preservation, Cheyenne Mountain Zoo offers an unforgettable experience that combines education with breathtaking views.
13. Memphis Zoo
Situated in the heart of Tennessee, the Memphis Zoo covers 76 acres and houses over 3,500 animals representing more than 500 species. This historic institution, founded in 1906, has evolved into a world-class facility that seamlessly blends entertainment with education and conservation.
The Memphis Zoo is renowned for its successful giant panda breeding program, one of only four in the United States. Visitors can explore diverse exhibits like the Teton Trek, which recreates the ecosystem of the Northwest, or the African Veldt, home to large mammals like elephants and giraffes.
The zoo’s commitment to conservation is evident in its participation in numerous Species Survival Plans and its state-of-the-art veterinary hospital. By combining cutting-edge research with engaging exhibits, the Memphis Zoo continues to inspire visitors to become stewards of wildlife.
Davin is a jack-of-all-trades but has professional training and experience in various home and garden subjects. He leans on other experts when needed and edits and fact-checks all articles.