Brian William Mier (21 February 1935 – 12 September 2009) was an Australian politician.
He was born in Footscray in Melbourne to Edward Alexander Mier, a dispatch clerk, and Elsie Elizabeth, née Hunter.
He attended local state schools and became an apprentice plumber in 1949.
He underwent national service from 1954 to 1956, after which he joined the Labor Party and became an organiser with the Plumbers and Gasfitters Employees Union (PGEU).
In 1982 he was elected to the Victorian Legislative Council in a by-election for the seat of Waverley Province.