Thomas Dadford Jr. (ca. 1761 to 1801) was an English canal engineer, who came from a family of canal engineers. He first worked with his father in the north of Britain on the Stour and the Trent, but later independently, contributing to a number of canal schemes, mainly in Monmouthshire and Glamorganshire but also in Montgomeryshire and Ellesmere, before dying at the age of 40.