Toolibin Lake is a 493 hectares (1,218 acres) nature reserve containing a seasonal fresh to brackish water perched lake or wooded swamp, in south-western Australia. It lies about 200 kilometres (124 mi) south-east of Perth, in the Shire of Narrogin, and 40 kilometres (25 mi) east of the town of Narrogin, in the Wheatbelt region of Western Australia.