Thomas de Kirkcudbright, also known as Thomas de Dalton [de Daltoun], was a medieval prelate from the Kingdom of Scotland. He was apparently a nutritus, or foster son, of Robert V de Brus, Lord of Annandale, and seems to have been closely linked in some way to Adam de Kirkcudbright, the man who held the church of Dalton in Annandale. He was likely a native Galwegian or perhaps a native of Annandale.