Travelers are voting Seattle Aquarium as the best aquarium in Seattle. There are 1 aquarium in St. Helens a city just 123 km from Seattle and 1 aquarium in Cloverdale which is 182 km distant. The most popular of these are Oregon Zoo in St. Helens and Oregon Coast Aquarium in Cloverdale. You can find 1 aquarium in Washington and 38 aquariums in the country of United States. Our members favorite in Washington is Seattle Aquarium and Aquarium Of The Bay is the top pick in United States. Want more? Check out our map of aquariums in Seattle.