Bertrand I of Forcalquier (c. 1104 – 1150) was Count of Forcalquier from 1129 to 1144, enfeudated to his brother Pons. He was the second son of William III and Emma of Provence.
He married Josserande de Flotte, daughter of Arnould de Flotte and Adelaide de Comps. They produced four known children – two sons and two daughters. (Dates do not add up his mother Emma of Provence died in 1060 c.e.)