Charles Maitland, 3rd Earl of Lauderdale (c. 1620 Lethington – 9 June 1691, Haltoun House), was the second son (The Great Seal of Scotland gives him as third son) of John Maitland, 1st Earl of Lauderdale (died 1645).
Following the death of his father-in-law, Richard Lauder of Haltoun, in November 1675, he formally adopted the territorial designation Charles Maitland of Haltoun, although he had the barony of Haltoun settled upon him in fee on 4 December 1660.
Shortly after the Restoration of King Charles II (4 December 1660), Charles Maitland was created sole Captain-General of The Mint for life, and appointed a Privy Counsellor 15 June 1661. He was elected one of the Commissioners for Edinburghshire and Lord of the Articles in the parliament of 1669. On the 1 (or 8) June 1670 he was admitted an Ordinary Lord and Senator of the College of Justice as Lord Haltoun. In February 1671, he succeeded Sir William Bellenden as Treasurer-Depute, and shortly afterwards, following the quarrel between the John Maitland, 1st Duke of Lauderdale and the Earl of Tweeddale, became his brother's chief assistant in the management of Scottish affairs.
By charter of novodamus of 1676, later ratified by the Scots Parliament, King Charles II granted Charles Maitland, Lord Haltoun, "the office of bearing our insignia within our said realm of Scotland". (But in 1952, the Lord Lyon decided that the Earl of Lauderdale's right was to bear the saltire as the Bearer of the National Flag of Scotland, whereas the Earl of Dundee as the Bearer of the Royal Banner bears the Royal Standard of the lion rampant).