Countess of Loudoun is the title which may be held by a woman in her own right or given to the wife of the Earl of Loudoun. Women who have held the title include:

• Flora Mure-Campbell, Marchioness of Hastings (6th Countess of Loudoun; 1780-1840)
• Edith Rawdon-Hastings, 10th Countess of Loudoun (1833-1874)
• Edith Abney-Hastings, 12th Countess of Loudoun (1883-1960)
• Barbara Abney-Hastings, 13th Countess of Loudoun (1919-2002)

• Barbara Rawdon-Hastings, Marchioness of Hastings (1810-1858)

• Countess of Loudoun (ship)

This disambiguation page lists articles associated with the title Countess of Loudoun.
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