Elizabeth, Countess of Falmouth

Mary, Countess of Falmouth and Dorset (1645 – 1679) was a British courtier. She was one of the Windsor Beauties painted by Sir Peter Lely. Her portrait by Lely was erroneously named "Elizabeth, Countess of Falmouth" and also as "Countess of Ossory" in some portrait prints and books in the 18th and 19th centuries, many of which were later reprinted, compounding the error.

Her father was Col. Henry Bagot, and mother was Dorothea Arden. She married Charles Berkeley, 1st Earl of Falmouth in 1663. He died at the Battle of Lowestoft. She then married Charles Sackville, 6th Earl of Dorset in June 1674.

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