General Sir Thomas Montagu Steele GCB PC (Ire) (11 May 1820, Guilsborough, Northamptonshire – 25 February 1890 Frimley Park, Farnborough) was a British army officer.

As the eldest son of Major-General Thomas Steele and Lady Elizabeth Montagu, second daughter of the fifth duke of Manchester, he attended Royal Military College, Sandhurst, before being commissioned as an ensign in the 64th foot in January 1838.

He married his first wife Isabel Fitzgerald in 1856 and, on her death 2 years later, he remarried in 1865 to the American Rosalie Malvina McCarty of New York.

He was promoted to major-general in 1865 and then commanded the troops in the Dublin district (1 April 1872 – 31 March 1874).

Promoted to lieutenant general in 1874, he commanded the Aldershot Division (14 April 1875 – 30 June 1880)[2] and, having been promoted to full general in 1877, he commanded the British forces in Ireland (1880–85), finally retiring in 1887.