William of Poitiers (disambiguation)

There were several Counts of Poitiers named William:

• William I (915–963), called Towhead, count from 935
• William II (937–994), called Fierebras, count from 963 to 990
• William III (969–1030), called the Great, count from 990
• William IV (1004–1038), called the Fat, count from 1034
• William V (1023–1058), called the Eagle, count from 1039
• William VI (1025–1086), count from 1058
• William VII (1071–1126), called the Troubadour, count from 1086
• William VIII (1099–1137), called the Saint, count from 1126
• William IX (1153–1156), count at his death