Frederick William Moorhead KC (1863 – 27 November 1902) was an Australian barrister, politician, and judge. He was born in Ireland and emigrated to Western Australia in 1889. Moorhead was a member of the Legislative Assembly of Western Australia from 1899 to 1901, and briefly served as the state's attorney-general in the government of Alf Morgans. He was appointed to the Supreme Court of Western Australia in April 1902, but died after only seven months in office.