Lawrence, son of Kemény (Hungarian: Kemény fia Lőrinc; died after 1274) was a Hungarian influential lord and military leader in the 13th century, who held various positions in the royal court since the late 1250s. He was a skilled and loyal soldier during the reign of Béla IV of Hungary. He retained his influence in the courts of Stephen V and Ladislaus IV too, representing a stable point in the government, when two baronial groups fought for the supreme power. Through his sons, he was ancestor of the Cseményi and Matucsinai noble families.