The United States has roughly 2,000 to 2,500 aquariums open to the public

The exact count shifts year to year because small facilities open and close regularly, but the American Alliance of Museums and the Association of Zoos and Aquariums track membership across major institutions. Large, well-known aquariums like the Georgia Aquarium in Atlanta and the Monterey Bay Aquarium in California are part of this count, but the majority are smaller regional facilities, touch tanks, and educational centers in cities and towns across the country.

What counts as an aquarium for these numbers varies. Some counts include only facilities with paid admission and professional staff. Others include nonprofit educational centers, university research tanks open to visitors, and municipal facilities. A facility with a single large tank and a gift shop counts differently than a sprawling complex with multiple buildings. This variation is why different sources report different totals.

The number has grown steadily since the 1980s as communities invested in waterfront attractions and educational institutions expanded their public programs. Some regions have far more aquariums than others — coastal states like California, Florida, and New York have the highest concentration, though landlocked states also operate successful facilities focused on freshwater species and conservation education.

Key Takeaways

  • The United States has between 2,000 and 2,500 public aquariums, though the exact number depends on how each source defines an aquarium.
  • Large, well-staffed facilities make up a small fraction of the total; most are smaller regional centers and educational institutions.
  • Coastal states have more aquariums per capita, but every state has at least one public facility where you can see aquatic life.
  • The count changes annually as small facilities open and close, so any single number is a snapshot rather than a fixed total.

Why the count varies between sources

Different organizations use different definitions. The Association of Zoos and Aquariums counts only accredited members, which means large, professionally staffed facilities that meet specific standards for animal care and visitor experience. That number is much smaller — roughly 200 to 300 accredited aquariums. A broader count that includes any facility with tanks open to the public — university research centers, nature centers, small municipal tanks — reaches into the thousands.

Size matters too. A major aquarium like the Shedd Aquarium in Chicago or the National Aquarium in Baltimore operates with a staff of hundreds and millions in annual budget. A small touch tank at a local nature preserve might have one or two staff members and operate on a fraction of that budget. Both are aquariums, but they serve very different purposes and draw different visitor numbers.

Geographic definitions also shift the count. Some sources count only facilities within the 50 states. Others include U.S. territories like Puerto Rico and the U.S. Virgin Islands, which have their own aquariums. The difference is usually small but adds to the variation you see in different reports.

Where aquariums are concentrated

Coastal regions have the highest density of aquariums because they can feature local marine species and draw tourists. California, Florida, and the Northeast corridor (Massachusetts, New York, New Jersey) have the most facilities. The Georgia Aquarium, one of the largest in the world, sits in Atlanta — a landlocked city that invested heavily in a major attraction.

Inland states rely more on freshwater species and educational missions. The Aquarium of the Bay in San Francisco, the Birch Aquarium in San Diego, and the Aquarium of the Pacific in Long Beach represent California's cluster. Florida's count is similarly high because of both ocean access and the state's tourism economy. Texas, despite being large, has fewer major aquariums than coastal states but still operates several significant facilities.

Rural areas and smaller towns often have smaller facilities — sometimes just a few tanks in a nature center or museum. These are less visible in national counts but serve local communities and school groups. The distribution reflects both population density and proximity to water that makes marine or freshwater exhibits feasible.

How major aquariums differ from smaller ones

The largest aquariums in the United States employ hundreds of staff members, operate research programs, and house tens of thousands of animals. The Georgia Aquarium holds over 10 million gallons of water and features whale sharks, beluga whales, and hundreds of other species. The Monterey Bay Aquarium focuses on Pacific Ocean species and runs conservation research alongside public exhibits. These facilities have budgets in the tens of millions of dollars annually.

Mid-sized aquariums, found in most major cities, operate with smaller staff and budgets but still offer diverse exhibits and educational programs. They might focus on regional species or a specific theme — freshwater ecosystems, coral reefs, or local wildlife. A regional aquarium might have 500,000 to 2 million gallons of water and employ 50 to 100 people.

Small aquariums and touch tanks operate with minimal staff and focus on education or local species. A small facility might be part of a nature center, zoo, or museum and feature only a few exhibits. These places often serve school groups and families in their when ready area and rely on volunteers or part-time staff. They are no less important to their communities but operate on a completely different scale.

How the number has changed over time

The modern public aquarium boom began in the 1980s and 1990s when cities saw aquariums as waterfront development tools and tourist attractions. Before that, aquariums were rare and mostly limited to major cities and research institutions. The opening of the Georgia Aquarium in 2005 and the expansion of existing facilities in the 2000s accelerated growth.

The COVID-19 pandemic temporarily reduced the count as some smaller facilities closed permanently. Larger institutions reopened, but the closure rate for small, independent aquariums was higher than for major facilities. Recovery has been uneven — some regions have rebuilt their aquarium offerings while others have not.

Looking forward, the count is likely to remain relatively stable. New major aquariums are expensive to build and require sustained funding, so large new facilities are rare. Growth is more likely in smaller educational centers and renovations of existing spaces rather than entirely new large institutions.

What these numbers mean for visitors

With 2,000 to 2,500 aquariums across the country, most Americans live within a reasonable drive of at least one facility. Major cities have multiple options. Smaller towns often have at least a small aquarium or touch tank as part of a nature center or museum. This means you have choices about what kind of experience you want — a major destination aquarium or a small local facility.

The variety also means different price points and experiences. A major aquarium might charge $30 to $40 per adult and take several hours to explore. A small municipal tank might charge $5 to $10 or be free. Educational quality and animal welfare standards vary too, which is why accreditation matters if those things concern you.

The sheer number of facilities also reflects how popular aquariums are in American culture. They rank among the most visited attractions in the country, drawing millions of visitors annually. This popularity supports jobs, education, and conservation work across the industry.

Frequently Asked Questions

Which state has the most aquariums?

Florida and California have the highest counts, with Florida benefiting from ocean access and tourism infrastructure, and California from both coastal location and major urban centers. Exact numbers vary by source, but both states have well over 100 public aquariums when you include all sizes and types.

What is the largest aquarium in the United States?

The Georgia Aquarium in Atlanta holds over 10 million gallons of water and is the largest by volume. The Monterey Bay Aquarium in California is often considered the most prestigious and influential, though it is smaller by total water volume.

Are all aquariums accredited?

No. Only about 200 to 300 aquariums in the United States are accredited by the Association of Zoos and Aquariums. Accreditation means the facility meets standards for animal care, staff training, and visitor experience. Many smaller facilities operate without accreditation but still serve their communities.

How many aquariums are in my state?

This depends on how you define aquarium and which source you check. Your state's tourism board or a search for "aquariums near me" will show public facilities in your area. Major cities almost always have at least one significant facility, and many smaller towns have educational centers with aquatic exhibits.

Do aquariums help with conservation?

Many do, especially larger accredited facilities. They fund research, breed endangered species, and educate the public about marine and freshwater ecosystems. Smaller facilities focus more on local education, though some also participate in conservation programs. The level of conservation work varies widely across the industry.