Portland Children's Museum, Children's museum in Portland, Oregon, United States

The Portland Children's Museum occupied a 50,000 sq ft building in Washington Park, next to the Oregon Zoo, in a structure that previously housed the Oregon Museum of Science and Industry. Its exhibits included Water Works, Play-it-Again Theater, Building Bridgetown, Groundworks, Outdoor Adventure, and the Baby's Garden, along with art studios The Clay Studio, The Wonder Corner, and The Garage.

The museum was founded in 1946 and served families for several decades before financial difficulties during the pandemic led to its permanent closure in 2021. It was one of the longest-running children's museums on the West Coast.

The museum's name changed from Adventure House to Portland Children's Museum. Its Opal School, chartered by Portland Public Schools, drew on the Reggio Emilia approach. The Community Partners Program gave over 20,000 children and families access as of 2009.

The museum closed permanently in 2021 and no longer accepts visitors. Families looking for similar spaces can explore options in nearby cities such as Vancouver, Beaverton, or Tigard.

After the museum closed, the Columbia Play Project launched a mobile play truck to continue bringing learning opportunities to children across the city. The project is working toward opening a permanent space by 2026.