In 1979, the square dance was designated as the official Washington state dance
Eighty percent of the glacial ice in the U.S is found in Washington State.
In Seattle it is illegal to carry a fishbowl or aquarium onto a bus because the sound of the water sloshing may disturb other passengers.
The Farmer's Market at Pike Place Market, since 1907, is the longest continuously operating farmer's market in the US.
It is against the law to set fire to another person's property without prior permission in Seattle.
Vancouver, Washington requires all motor vehicles to carry anchors as an emergency brake.
Seattle's houseboat population is the largest east of the Orient.
The Washington State Ferry System is the largest Ferry System in the US and the state's number one tourist attraction.
Snoqualmie Falls plunges 100 feet further than Niagara Falls.
At low tide, there can be up to 786 islands in the Puget Sound.
The Mercer Island Floating Bridge (now I-90), built in 1950 was the first floating bridge in the world.