Thomas Foster was an architect active especially in Bristol, England in the 19th century. He was the son of the Bristol architect, James Foster, senior and brother of the architect James Foster, junior.
Thomas worked alone and later in partnership with his brother James and his pupil William Ignatius Okely in the firm Foster and Okely based in Orchard Street, Bristol.
After his brother's death in 1836, and after Okely left the firm in 1840, Thomas was joined in partnership by his son John Foster (died 1880).
Thomas died on 6 July 1849. After his death, his son, John continued on the practice.
Colvin, Howard, A Biographical Dictionary of British Architects 1600-1840, 3rd edition (New Haven and London: Yale University Press, 1995), pp. 372-373.