There is no single "best" aquarium—it depends on what you want to experience

The largest aquarium in the United States is the Georgia Aquarium in Atlanta, which holds 10 million gallons of water and features whale sharks, beluga whales, and thousands of fish species. The Monterey Bay Aquarium in California is smaller but is widely regarded as the most scientifically rigorous and focuses on Pacific Ocean ecosystems. The Shedd Aquarium in Chicago ranks among the most visited and offers interactive touch pools and dolphin shows. The choice between them depends on whether you prioritize size, scientific depth, location, or the types of animals you most want to see.

Your decision also depends on travel distance and budget. If you live in the Midwest, the Shedd Aquarium may be your most practical choice. If you are on the West Coast, the Monterey Bay Aquarium or Birch Aquarium may offer better value and less travel time. If you want to see animals found nowhere else in captivity in the United States, the Georgia Aquarium is your only option for whale sharks.

Key Takeaways

  • The Georgia Aquarium in Atlanta is the largest by volume and features whale sharks and beluga whales that you cannot see at most other facilities.
  • The Monterey Bay Aquarium focuses on Pacific Ocean animals and conservation research, making it the best choice if you want to understand marine ecosystems rather than just view animals.
  • The Shedd Aquarium in Chicago is the most visited and offers the most interactive experiences, including touch pools and live animal demonstrations.
  • Regional aquariums like the Birch Aquarium in San Diego and the National Aquarium in Baltimore each specialize in different habitats and offer distinct experiences depending on your interests.
  • Travel distance and admission cost vary significantly, so the "best" aquarium for you may straightforward be the one closest to where you live.

Georgia Aquarium: The Largest by Volume

The Georgia Aquarium in Atlanta holds 10 million gallons of water across multiple galleries. It is the only facility in the United States where you can see whale sharks—the world's largest fish species—in captivity. The aquarium also houses beluga whales, manta rays, and sea lions, along with thousands of smaller fish and invertebrates organized by habitat type.

The facility spans 10 acres and includes both indoor galleries and outdoor habitats. Admission typically ranges from $30 to $45 depending on the season and whether you purchase online in advance. The aquarium is located in downtown Atlanta near the World of Coca-Cola and the World Wildlife Fund building, making it straightforward to combine with other attractions. Peak visiting times are summer months and school holidays, so weekday visits in spring or fall tend to be less crowded.

Monterey Bay Aquarium: The Most Scientifically Focused

The Monterey Bay Aquarium in Monterey, California, is smaller than the Georgia Aquarium but is built around living research conducted by the Monterey Bay Aquarium Research Institute. The facility specializes in animals from the Pacific Ocean, particularly species found along the California coast. Its kelp forest exhibit is one of the most recognizable in the country and features live kelp that is harvested and replanted regularly to maintain the ecosystem.

The aquarium emphasizes conservation and ocean science over entertainment. Exhibits include sea otters, jellyfish, octopuses, and deep-sea creatures that are rarely displayed elsewhere. Admission is typically $50 to $60, making it one of the more expensive options. The location in Monterey puts it near Big Sur and other coastal attractions, but travel to California is a significant commitment for visitors from other regions. The facility is open year-round, though winter months (November through February) have the calmest ocean conditions and the most active marine life.

Shedd Aquarium: The Most Interactive and Visited

The Shedd Aquarium in Chicago is located on Lake Michigan and is one of the most visited aquariums in the country. It features interactive touch pools where visitors can handle starfish and sea anemones, live dolphin and sea lion demonstrations, and a 3D theater. The facility houses beluga whales, dolphins, sea lions, and thousands of fish species across multiple galleries organized by geographic region.

Admission ranges from $30 to $45 for general entry, with additional fees for premium experiences like the dolphin encounter program. The aquarium is accessible by public transit and is located near the Museum of Science and Industry and the Field Museum, making it part of a larger cultural district. Summer weekends and school holidays are extremely crowded; visiting on a weekday in fall or winter provides a better experience. The facility is open year-round and offers special evening hours during summer months.

Regional Aquariums Worth Considering

The National Aquarium in Baltimore, Maryland, is the second-largest by volume in the United States and features a tropical rainforest exhibit, a shark alley, and a living seawall. Admission is typically $30 to $40. The Birch Aquarium in San Diego, California, is smaller and focuses on Pacific Ocean species, with a particular emphasis on seahorses and jellyfish. Admission is usually $20 to $25, making it one of the most affordable options.

The Aquarium of the Pacific in Long Beach, California, holds 12.5 million gallons and features interactive touch pools, a shark lagoon, and a Lorikeet Forest where birds land on your arm. Admission ranges from $30 to $35. The Aquarium of the Bay in San Francisco is located at Fisherman's Wharf and specializes in local San Francisco Bay species, including leopard sharks and bat rays. Each of these facilities offers a distinct experience based on the animals they house and the ecosystems they represent.

How to Choose Based on What You Want to See

If you want to see the largest animals and the most species in one visit, the Georgia Aquarium or Aquarium of the Pacific are your best options. If you are interested in understanding how marine ecosystems work and want to see conservation science in action, the Monterey Bay Aquarium is the strongest choice. If you are traveling with children and want hands-on experiences, the Shedd Aquarium and Aquarium of the Pacific both offer extensive touch pools and interactive demonstrations.

If you want to see animals found specifically in your region, choose a facility that focuses on your local ocean or coastal habitat. The Birch Aquarium in San Diego and the Aquarium of the Bay in San Francisco both emphasize local species. If cost is a primary concern, the Birch Aquarium and the Aquarium of the Bay are typically the least expensive. If you want to combine your aquarium visit with other attractions, the Shedd Aquarium in Chicago and the Aquarium of the Bay in San Francisco both sit near major museums and cultural sites.

Practical Information for Planning Your Visit

Most major aquariums offer discounted admission if you purchase tickets online in advance, typically saving $5 to $10 per ticket. Many facilities offer annual memberships that pay for themselves after two or three visits and include free parking and discounts at the gift shop. Visiting on a weekday rather than a weekend reduces crowds significantly at all facilities.

Parking and transportation vary by location. The Shedd Aquarium in Chicago and the Aquarium of the Bay in San Francisco are accessible by public transit. The Georgia Aquarium and Aquarium of the Pacific require a car or paid parking. Most aquariums are open year-round, though hours may be shorter in winter months. Plan to spend two to four hours at a facility depending on how thoroughly you want to explore. Bring comfortable shoes, as you will be standing and walking on concrete floors for extended periods.

Frequently Asked Questions

Which aquarium has the most animals?

The Georgia Aquarium holds the most water (10 million gallons) and therefore houses the most individual animals. However, the Aquarium of the Pacific (12.5 million gallons) and the National Aquarium in Baltimore also hold massive collections. The number of species varies by facility and changes as exhibits are updated.

Can I see whale sharks at any aquarium besides Georgia?

Whale sharks are only displayed at the Georgia Aquarium in the United States. A few other countries have whale shark exhibits, but Georgia is the only facility in North America where you can see them. If seeing whale sharks is your primary goal, the Georgia Aquarium is your only option.

Which aquarium is best for young children?

The Shedd Aquarium in Chicago and the Aquarium of the Pacific in Long Beach both have extensive touch pools and interactive demonstrations designed for children. The Birch Aquarium in San Diego is smaller and less overwhelming for young visitors. All three offer programs specifically for families with young children.

How much does admission typically cost?

General admission ranges from $20 to $60 depending on the facility and whether you purchase in advance. Most major aquariums offer discounts for children, seniors, and military personnel. Annual memberships typically cost $100 to $200 and include free admission and parking.

What is the best time of year to visit?

Spring (April and May) and fall (September and October) offer mild weather and smaller crowds than summer. Winter months are less crowded but have shorter operating hours at some facilities. Avoid summer weekends and school holidays if you prefer a less crowded experience.