Harriet Sarah Loyd-Lindsay (née Jones-Loyd), Baroness Wantage (30 June 1837 – 9 August 1920), was a British art collector and benefactor.

She was the sole heiress to the fortune of her parents Harriet Wright and Samuel Jones-Loyd, 1st Baron Overstone, who gave her Lockinge House near Wantage as a wedding present when she married Robert Loyd-Lindsay in 1858.

Two years later her husband was made peer of the realm and she wrote a biography of him which was published after his death.

Her large art collection at Lockinge House, which included Turner's High Street, Oxford, Claude Lorrain's Landscape with Psyche Outside the Palace of Cupid, and other works by modern artists as well as old masters, was largely dispersed and sold after her death.

Her heir A. T. Loyd sold the principal paintings at Sotheby's, London, 28 Nov. 1945.