Arnold II of Isenburg (c. 1190 – 1259) was Archbishop of Trier from 1242 to his death. A long-time member of the cathedral chapter in Trier, he held several provostships before being elected as archbishop, succeeding his uncle Theoderich von Wied. The election was controversial, and king Conrad IV of Germany granted the regalia to Rudolf de Ponte, the opposing candidate, instead. Arnold was confirmed as archbishop by Pope Innocent IV and consecrated in 1245.