Adélaïde de Vermandois was a noblewoman from the 10th century, born around 895. She was the daughter of Hugues de Vermandois and Adélaïde de France. Adélaïde played a significant role in the political landscape of her time, marrying several influential figures, including Raoul de Crépy, which helped strengthen alliances among the French nobility. Her marriages were strategic, aimed at consolidating power and influence. Adélaïde's lineage connected her to various noble families, making her an important figure in the feudal system of medieval France. She is often remembered for her contributions to the political dynamics of her era.