The rail had a restricted distribution in the far south-west of Western Australia, from Margaret River to Albany, and inland as far as Bridgetown.
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A subspecies of Lewin's Rail, listed as Lewin's Water Rail (Rallus pectoralis clelandi), is on Western Australia's Wildlife Conservation (Specially Protected Fauna) Notice 2008 Schedule 2 — Fauna presumed to be extinct under the WA Wildlife Conservation Act 1950.