 Brimstage was formerly a township in Bromborough Parish of the Wirral Hundred.The population was 127 in 1801, 126 in 1851, 181 in 1901 and 135 in 1951.On 1 April 1974, local government reorganisation in England and Wales resulted in most of Wirral, including Brimstage, transfer from the county of Cheshire to Merseyside as part of the Metropolitan Borough of Wirral.