Elizabeth Wellesley, Duchess of Wellington, VA (née Hay; 27 September 1820 – 13 August 1904), was a daughter of the 8th Marquess of Tweeddale.

Her husband, Lord Douro, succeeded his father as duke of Wellington in 1852.

One of her brothers was the ornithologist Viscount Walden, and another the Admiral of the Fleet Lord John Hay.

On 18 April 1839, she was married to Lord Douro, eldest son of the famous general and former Tory Prime Minister the 1st Duke of Wellington.

They had no children, and the marriage, which had been arranged by their respective families, was not a happy one;[1][2] the historian Norman Gash writes, however, that her father-in-law "found much domestic pleasure" in Elizabeth's company.