Willunga Courthouse and Slate Museum

The Willunga Courthouse and Slate Museum is a heritage museum housed in the 1855 former Willunga Courthouse and police station on High Street in Willunga, South Australia, within the City of Onkaparinga. Operated by the National Trust of South Australia, it preserves the region's slate quarrying history and 19th-century judicial heritage. Displays include courtroom furnishings, police artefacts, slate samples, tools and photographs illustrating Willunga's role as a major slate producer in colonial South Australia.

Visitors can expect a small heritage museum set in a restored stone courthouse and former police station with attached cells. Inside, the original courtroom is furnished to reflect 19th-century judicial use, with displays on local policing, slate quarrying tools, slate samples, photographs, documents and domestic artefacts. The building is surrounded by a small garden and is located on High Street in central Willunga, within walking distance of shops and cafes. Volunteer guides are often available to explain exhibits.