Empress Dowager Bo (薄太后), personal name lost to history, was an imperial concubine of Emperor Gaozu of Han (Liu Bang).

Despite being a concubine of lower standing, her son, Liu Heng, became Emperor Wen of Han, cementing her place in history.

Unlike other defectors who switched sides again after Liu Bang's final victory, Wei Bao remained loyal to Xiang Yu to the end.

Wei Bao begged for mercy, but the emperor was unreceptive until he offered Lady Bo as a gift to Liu Bang.

Lady Bo was not favored among the concubines, but she gave birth to a son, Liu Heng, who was made the Prince of Dai.

Unlike many other concubines, she was not confined to the palace and was allowed to accompany her son to the remote Principality of Dai (modern northern Shanxi and northwestern Hebei) to be the princess dowager.

[2] She either did not try to intercede similarly (as appears most likely) or was ineffective in her intercession, when her brother Bo Zhao killed an imperial messenger—a crime far more serious than ordinary murder—in 170 BC.

Even though Bo Zhao was the Empress Dowager's only sibling, Emperor Wen eventually pressed him into committing suicide.

One of the final influences Empress Dowager Bo had was when she arranged for the daughter of one of her relatives to marry her grandson, then-Crown Prince Qi, during her son's reign.