Thomas Forster (1676/7 – after 1712;[1]) was an English portrait draughtsman and miniaturist.
Forster is known from a number of small portraits in pencil on vellum, and according to Lionel Cust they are "drawn with exquisite care and feeling".[2] The majority of these were no doubt intended for engraving as frontispieces to books, and the following were so engraved by Michael Vander Gucht and others: John Savage, Sir Thomas Littleton, the Speaker, William Lloyd, Bishop of St. Asaph, Humphry Hody, John Newte, and others.
Unlike David Loggan, Robert White, and John Faber Senior, who drew portraits "ad vivum" in the same style, Forster does not appear to have been an engraver himself. A number of his drawings were exhibited at the special Exhibition of Portrait Miniatures at the South Kensington Museum in 1865; they included Robert, Lord Lucas, Archbishop Ussher, Sir Thomas Pope Blount, Baronet, Lady Blount, John, Lord Somers, and Admiral Sir George Rooke. A drawing of Margaret Harcourt was acquired for the print room at the British Museum. His portraits are highly valued.