Ross Poldark ultimately ends up with Demelza Carne. They marry several years after Ross returns from the war, and although Ross initially had unresolved feelings for his first love Elizabeth, he falls deeply in love with Demelza and declares her as his true love. Over the course of the series, Ross and Demelza have a lasting marriage and five children together, with their relationship being a central, enduring love story in the saga.
Elizabeth, Ross's first love, ends up marrying George Warleggan, though it is complicated by her past with Ross and the paternity of one of her children. But Ross's final and enduring partnership is with Demelza.