Theodore Unmack
Member of the Queensland Legislative Assembly for Toowong
In office 19 May 1888 – 29 April 1893
Preceded by	New seat
Succeeded by	Matthew Reid
Personal details
Born	Theodore Oscar Unmack (1835-12-21)21 December 1835 Hamburg, Germany
Died	17 September 1919(1919-09-17) (aged 83) Brisbane, Queensland, Australia
Resting place	Toowong Cemetery
Nationality	Australian
Spouse(s)	Kathleen Macdonnell, Robina Glassford
Occupation	Businessman

Theodore Oscar Unmack (21 December 1835^[1] – 17 September 1919)^[2] was a politician in Queensland, Australia. He was a Member of the Queensland Legislative Assembly and Postmaster-General of Queensland.

Unmack was born at Hamburg and arrived in Victoria (Australia) in 1853, where he engaged in mercantile pursuits.^[3] He went to Queensland in 1860, and commenced business in Brisbane.^[3]

On 19 May 1888, Unmack was elected to the Queensland Legislative Assembly in the electoral district of Toowong in the 1888 colonial election.^[3] He held the seat until 29 April 1893 (the 1893 election).^[4][5]

Unmack was also president of the Brisbane Chamber of Commerce for several years, and for two years acted as Consul for Germany.^[6] He was a prominent Freemason, and held the position of Provincial Grand Master (T.C.).

On the accession to power of Sir Samuel Griffith, Unmack was appointed Secretary for Railways and Postmaster-General on 12 August 1890; he held those roles until 27 March 1893.^[3][4]

Unmack died on 17 September 1919 and was buried in Toowong Cemetery.^[7] He was survived by his second wife, four sons and two daughters.^[6]