Fulk of Jerusalem was born between 1089 and 1092. He was the son of Fulk IV of Anjou. He married Aremburge de Maine. He died on November 13, 1143.

Fulk of Jerusalem was also known as Fulke Count of Anjou. He was Count of Anjou from 1109 to 1129, and King of Jerusalem from 1131 to his death. By 1127 [during the second crusade] Fulk was preparing to return to Anjou when he received an embassy from King Baldwin II of Jerusalem. Baldwin II had no male heirs but had already designated his daughter Melisende to succeed him. Baldwin II wanted to safeguard his daughter's inheritance by marrying her to a powerful lord. Fulk was a wealthy crusader and experienced military commander, and a widower. His experience in the field would prove invaluable in a frontier state always in the grip of war.

However, Fulk held out for better terms than mere consort of the Queen; he wanted to be king alongside Melisende. Baldwin II, reflecting on Fulk's fortune and military exploits, acquiesced. Fulk abdicated his county seat of Anjou to his son Geoffery and left for Jerusalem, where he married Melisende [as his second wife] on June 2, 1129. Later Baldwin II bolstered Melisende's position in the kingdom by making her sole guardian of her son by Fulk, Baldwin III, born in 1130.
Fulk of Jerusalem was also known as Foulques V Comte d'Anjou.