Sir Henry Austin Lee, KCMG, CB (6 April 1847 − 7 November 1918) was a British diplomat, governor and landowner.

In 1871 he was appointed to the Foreign Office; where he served as a protocolist to the Sugar Conference in London in 1872 ; appointed British Commissioner in Paris, under article XXI of the Treaty of Commerce in November 1872 ; acted as Third Secretary in the Diplomatic Service from 6 August 1873.

After serving on the joint Channel-Tunnel Commission in April 1875, he was appointed with Sir Edward Malet to negotiate the renewal of the Treaty of Commerce with Italy; was attached to the Marquis of Salisbury, Robert Gascoyne-Cecil's Special Embassy to Constantinople, in November 1876, and to the special Embassy during the Congress at Berlin in June 1878, as Private Secretary to the Earl of Beaconsfield, Benjamin Disraeli.

He was Private Secretary to Sir Charles Wentworth Dilke, at the Foreign Office from 1880 to 1882; was a member, in 1881, of the Royal Commission for negotiating a Treaty of Commerce with France; was Private Secretary to Lord Edmond Fitzmaurice from 1883 to 1885, to James Bryce, 1st Viscount Bryce, in 1886, and to Sir James Fergusson, from 1886 to 1887.

He was knighted as a Knight Commander of the Order of St Michael and St George (KCMG) in the November 1902 Birthday Honours list,[5][6] and was invested with the insignia by King Edward VII at Buckingham Palace on 18 December 1902.