This is how the top 10 zoos in the United States polled according to some popular online sources.




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1. Henry Doorly Zoo Omaha, Nebraska
2. San Diego Zoo San Diego, California
3. St. Louis Zoo Saint Louis, Missouri
4. San Diego Zoo Safari Park Escondido, California
5. Cheyenne Mountain Zoo Colorado Springs, Colorado
6. Memphis Zoo Memphis, Tennessee
7. Denver Zoo Denver, Colorado
8. Riverbanks Zoo and Botanical Garden Columbia, South Carolina
9. Zoo Miami Miami, Florida
10. Fort Worth Zoo Fort Worth, Texas

USA Today.

1. Toledo Zoo – Toledo, Ohio
2. St. Louis Zoo – St. Louis
3. Cincinnati Zoo – Cincinnati
4. Memphis Zoo – Memphis Tennessee
5. Columbus Zoo – Columbus, Ohio
6. Henry Doorly Zoo – Omaha
7. Houston Zoo – Houston
8. Brookfield Zoo – Chicago Illinois
9. Dallas Zoo – Dallas
10. San Diego Zoo & Safari Park – San Diego

And the top 10 by attendance

1. San Diego Zoo: 3.2 million annual visitors
2. Lincoln Park Zoo: 3 million annual visitors
3. St. Louis Zoo: 2.9 million annual visitors
4. Columbus Zoo and Aquarium: 2.3 million annual visitors
5. Brookfield Zoo: 2.2 million visitors
6. Smithsonian National Zoological Park: 2.2 million visitors
7. Como Park Zoo and Conservatory: 2.2 million visitors
8. Bronx Zoo: 2 million visitors
9. Denver Zoological Gardens: 1.9 million visitors
10. Houston Zoo: 1.8 million visitors

In the #1. spot is the San Diego Zoo, San Diego California with 3.2 million annual visitors. #2 is the Lincoln Park Zoo, in Lincoln Nebraska with 3 million annual visitors. #3 is the St. Louis Zoo, St. Louis Missouri with 2.9 million annual visitors. #4 is the Columbus Zoo and Aquarium, Columbus Ohio with 2.3 million annual visitors. #5 is the Brookfield Zoo, Brookfield, IL with 2.2 million annual visitors. coming in #6 was the Smithsonian National Zoo, Washington, DC with 2.2 million visitors. #7 is the Como Park Zoo and Conservatory, in St. Paul, Minnesota with 2.2 million visitors. coming in #8 was the Bronx Zoo, Bronx New York with 2 million visitors annual visitors. #9 is the Denver Zoological Gardens, in Denver Colorado with 1.9 million annual visitors. and #10 is the Houston Zoo, Houston Texas with 1.8 million visitors.