Theodoric VI of Isenburg-Kempenich was the co-Lord of Isenburg-Kempenich from 1367 until after 1378, ruling jointly with his brothers Simon III, John, and Henry. Theodoric VI was the second son of Simon II. After his death in 1367, Theodoric and his brothers became the co-rulers of Kempenich despite an agreement in 1345 whereby Kempenich was declared indivisible. Already in 1367 the brothers built a tomb for their father and sent their mother to the Abbey of Laach. Henry died in 1367 and Theodoric soon after 1378, leaving Simon and John as the lords.