Henry Osborn (2 June 1859—22 July 1937) was an Australian politician, and a member of the Western Australian Legislative Assembly from 1908 until 1911 representing the seat of Roebourne, as well as the mayor of two different municipalities in Western Australia.
In 1900, he moved to Midland Junction and became a partner in an aerated waters firm. He was elected mayor of the Midland Junction Municipal Council in 1907, a position he would hold for five years, and at the September 1908 state election, he was elected to the Legislative Assembly for a three-year term as the Ministerial member for Roebourne. At the October 1911 state election, he was defeated by a Labor candidate.
In 1910, following Minister for Lands James Mitchell's call for men to take up land and populate the interior, Osborn and his brother acquired land in Bruce Rock in the Eastern Wheatbelt region, where he farmed for the rest of his life. He became involved in the Bruce Rock Co-operative Society, and was its inaugural chairman from 1917 until his death.
Osborn died on 22 July 1937 at Bruce Rock, where he was buried.