Hackett Hall, Heritage building in Perth Cultural Centre, Perth, Australia

Hackett Hall is a heritage-listed building on James Street in the Perth Cultural Centre, its western end once adjoining the southern end of Museum Street. It formerly housed part of the State Library of Western Australia and now forms part of the WA Museum Boola Bardip complex, where it holds Otto, the museum's giant whale skeleton.

This building was originally developed as part of the State Library of Western Australia and received official heritage registration in 1992. That registration acknowledged its significance as a record of how Perth's cultural institutions evolved over time.

The hall carries the name of John Winthrop Hackett, benefactor of the University of Western Australia, and a hall of the same name stands on the university's main campus. In the 1930s it was designated the main building of the Public Library of Western Australia, known as the Public Library of Western Australia in Hackett Hall.

The building sits at the corner of James Street and Museum Street with good access via several public transportation routes throughout Perth. Visitors should check current access arrangements and opening hours before planning their visit.

Otto is the museum's giant whale skeleton, and Hackett Hall is its home. The building also shares its name with a separate hall at the University of Western Australia's main campus, so the two are often confused.