Countess Spencer may refer to:

• Georgiana Spencer, Countess Spencer (1737–1814), wife of John Spencer, 1st Earl Spencer
• Charlotte Spencer, Countess Spencer (1835–1903), wife of British Liberal politician Viscount Althorp
• Cynthia Spencer, Countess Spencer (1897–1972), paternal grandmother of Diana, Princess of Wales
• Raine Spencer, Countess Spencer (1929–2016), stepmother of Lady Diana Frances Spencer
• Victoria Aitken (formerly Victoria, Countess Spencer; born 1965), sister-in-law of Diana, Princess of Wales
• Karen Spencer, Countess Spencer (born 1972), sister-in-law of Diana, Princess of Wales

This disambiguation page lists articles associated with the title Countess Spencer.
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