Sir Francis Edmund Workman-Macnaghten, 3rd Baronet PC(I) (9 July 1828 – 21 July 1911) was an Anglo-Irish British Army officer and baronet.^[1]

Workman-Macnaghten was the eldest son of Sir Edmund Workman-Macnaghten, Bt and Mary Gwatkin, only child of Edward Gwatkin. His younger brother was Edward Macnaghten, Baron Macnaghten.^[1]

In 1876, he succeeded to his father's baronetcy. He was a lieutenant-colonel in the 8th Hussars and served in the Crimean War. On 21 May 1890, he was appointed Lord Lieutenant of Antrim and in 1906 he was made a member of the Privy Council of Ireland.^[1]

He married Alice Mary Russell on 6 June 1866. They divorced in 1883 having had four children.^[1]