Admiral of the Fleet Thomas Maitland, 11th Earl of Lauderdale, GCB (3 February 1803 – 1 September 1878) was a Royal Navy officer and peer.

[4] Maitland became commanding officer of the sloop HMS Sparrowhawk on the North America and West Indies Station in June 1832 and brought home a treasure freight of $589,405 and 42 bales of cochineal (a scale insect from which the crimson-coloured natural dye carmine is derived) when he returned in May 1833.

[1] He became commanding officer of the sixth-rate HMS Tweed and took part in the Battle of Luchana, an operation to defend the Port of Bilbao on the north coast of Spain, in December 1836 during the First Carlist War.

[1] As a result of this he was awarded the knight's cross of the Order of Charles III for his support for the liberal forces of Maria Christina, the Regent of Spain at the time of the minority of Isabella II, who had faced a revolt by Carlos, Count of Molina.

[10] Promoted to full admiral on 8 April 1868,[11] he retired in February 1873 and was advanced to Knight Grand Cross of the Order of the Bath on 24 May 1873.

Mary Jane Maitland married Reginald Brabazon, twelfth earl of Meath[14] He was succeeded in the earldom by Charles Barclay-Maitland, his second cousin once removed.