Margaret (Mary) Feilding (1613–1638) was a Scottish noblewoman, wife of Duke James Hamilton, and courtier of Queen Consort Henrietta Maria.

Following the marriage, she was briefly styled as the Countess of Arran, which was changed to Marchioness of Hamilton in 1625.

One died young, but Anne and Susanna, Countess of Cassillis, survived their mother.

[3] The contemporary Scottish historian Gilbert Burnet described Margaret as "a lady of great and singular worth" in his book Lives of the Hamiltons.

Edmund Waller wrote the poem Thyrsis, Galatea in praise of Margaret.