Sophie, Countess of Bar

Sophie of Bar (c. 1004 or 1018 – January 21 or June 21, 1093) was sovereign Count of Bar and lady of Mousson between 1033 and 1093. She succeeded her brother, Frederick III, Duke of Upper Lorraine, ruled in co-regency with her spouse Louis, Count of Montbéliard, and was succeeded by her son Frederick of Montbéliard.

She was a daughter of Frederick II, Duke of Upper Lorraine (died 1026/1027) and Matilda of Swabia. After her father died in 1026, she and her sister Beatrice went to live with their mother's sister, Empress Gisela. Her sister Beatrix (died 1076) married Boniface, margrave of Tuscany, and remarried after his death with Godfrey III, Duke of Lower Lotharingia.

Sophie was Countess of Bar between 1033 and 1092, in succession of her childless brother, Duke Frederick III of Upper Lotharingia (died 1033).

She married Louis, Count of Montbéliard (1019–1071 or 1073). Their son Count Thierry II of Bar-Montbéliard (1045–1105) succeeded to the county of Bar.