Frederick Thomas Derham (8 January 1844 – 12 March 1922) was an Australian politician and businessman.^[1]

Born inBristol, he grew up inSomerset to auctioneer Thomas Plumley Derham and Sarah Ann Watts, he arrived in Melbourne in 1856 and entered the business world. In 1864 he married Ada Maria Anderson in Melbourne, with whom he had four children; he later married Frances Dodd Swallow in 1878, with whom he had five children.^[1][2]

In the early 1850s, he co-founded and worked with Thomas Swallow in a biscuits manufacturing business in 1856. Derham also invested insugar plantations in which fruitcanneries and preserving works were developed near Cairns, Queensland in the 1870s.^[1]

Derham began his political career as the Mayor of Sandridge Municipal Council in the early 1880s. In 1883 he was elected to theVictorian Legislative Assembly as the member forSandridge, shifting toPort Melbourne in 1889; he served asPostmaster-General from 1886 to 1890.^[2] In that role, he introduced thepenny post into Victoria and alsoparcel post and country telephone services. During his time in politics, Derham had a close working relationship with 2ndPrime Minister,Alfred Deakin and was a passionate anti-socialist in his policies and political views.^[1]Subsequently, he was president of the Chamber of Manufacturers from 1897 to 1903 and of the Employers' Federation from 1901 to 1904.^[1]

Derham was a passionateAnglican and supporter of the Holy Trinity Church in Kew. Derham later died atKew in 1922.^[2][1]