Arnold I
Arnold I may refer to:
Clergy
- Arnold I of Cologne, the Archbishop of Cologne 1137–1151
- Arnold I of Vaucourt, the Archbishop of Trier 1169–1183
- Arnold I van Isenburg, the Bishop of Utrecht 1196–1197
- Arnold I (bishop of Coria), a Catholic bishop in Spain
- Arnold I (bishop of Poznań), a Catholic bishop in Poland
Nobility
- Arnold I of Astarac, the first Count of Astarac from 926
- Arnold I, [Count of Chiny], son of Louis II
- Arnold I, Count of Loon, son of Emmo
- Arnold I, Count of Cleves, the Count of Cleves 1119–1147
- Arnold I, Count of Laurenburg
- Arnold I, [Lord of Egmond], Lord of Egmond and IJsselstein