The Interstate 90 floating bridges is the common name for the twin floating bridges that carry a section of Interstate 90 across Lake Washington between Seattle and Mercer Island in the U.S. state of Washington. They are the:

• Lacey V. Murrow Memorial Bridge, which carries the highway's eastbound traffic and is the second longest floating bridge in the world
• Homer M. Hadley Memorial Bridge, which carries the highway's westbound traffic and is the fifth longest floating bridge in the world; it is planned to also carry light rail trains