龔太后（ - 562年），謚號元太后，中國南北朝之西梁開國皇帝蕭詧的母親。西梁僅僅控制江陵，是西魏、北周和隋朝的傀儡。

龔氏是昭明太子蕭統的妾室，依其號稱龔保林。龔氏於519年生下蕭詧。蕭統的其他兒子是否由她所生，不得而知。丈夫蕭紹在531年逝世，兒子蕭詧受封岳陽郡王。但沒有史料顯示她因兒子受封岳陽王太妃。蕭統的長子蕭歡是正妻蔡夫人所生。蕭詧和嫡母蔡夫人的侄子蔡大寶關係很好，而龔氏家族的外戚不顯，也沒有和蕭詧親近的記載。蕭詧對她，則「事母以孝聞」。

549年，侯景之亂，侯景攻克南梁都城建康，南梁大亂，諸王互相攻打。岳陽王蕭詧率軍攻打他叔叔湘東王蕭繹，救援他正被蕭繹圍攻的二哥河東王蕭譽。他離開襄陽時，襄陽由蔡大寶和龔保林留守。蕭詧的部將杜岸被蕭繹誘降後請求以五百騎攻打襄陽，被蔡、龔登陴閉門拒戰守住，投靠在廣平的兄長南陽太守杜����。蕭詧夜間撤軍回城，龔保林不知其已戰敗，以為也是敵軍，等天亮了見到了他，才放他入城。蕭詧派尹正、薛暉等人攻打廣平，俘虜杜岸、杜����和他們的家人，在襄陽城北門斬首。龔保林在眾人面前數落杜岸，杜岸說：「老婢叫自己的兒子殺叔叔，是枉殺忠良。」蕭詧滅杜氏一族。日後，丈夫蕭統的安寧陵亦被杜氏兄弟報複毀陵。

蕭詧為防蕭繹攻打而投靠西魏，被其立為梁王。555年，西魏派大將于謹率軍攻克江陵，殺死梁元帝蕭繹，立蕭詧為（西）梁皇帝（梁宣帝）。蕭詧其父蕭統為昭明皇帝，廟號高宗，蔡夫人為昭德皇后。尊母親龔氏為皇太后。562年，蕭詧去世，其子蕭巋繼位，尊龔太后為太皇太后，三個月後，龔太后去世，諡曰元太后。

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Empress Dowager Gong (龔太后, personal name unknown) (died June or July 562), formally Empress Dowager Yuan (元太后, literally "the discerning empress dowager") was an empress dowager of the Chinese dynasty Western Liang dynasty. She was the mother of Xiao Cha who founded the Western Liang with the support of Western Wei.

Lady Gong was a concubine of Xiao Tong, the first crown prince of Liang dynasty's founder Emperor Wu. Her rank was the second rank for a concubine of the crown prince, Baolin (保林). She gave birth to Xiao Cha in 519. (It is not known whether any of Xiao Tong's other four known sons were her sons as well, although his oldest son Xiao Huan (蕭歡) was not, as he was the son of Xiao Tong's wife Crown Princess Cai.) Little is known about her background, including her birth family, and Xiao Cha himself appeared to be closer to Crown Princess Cai's nephew Cai Dabao (蔡大寶) than he was with any maternal cousins he might have had.

Historical references to Lady Gong were not numerous. In 549, while Liang was in a state of disarray after the fall of the capital Jiankang to the rebel general Hou Jing and the imperial princes were battling each other, Xiao Cha, then the Prince of Yueyang, was leading an army against his uncle Xiao Yi the Prince of Xiangdong to try to save his brother Xiao Yu (蕭譽) the Prince of Hedong (whom Xiao Yi's forces were besieging), when he left his headquarters Xiangyang in the hands of Cai Dabao and Lady Gong (who was at that time still referred to as Baolin, not as princess dowager), and they defended the city against a surprise attack by the general Du An (杜岸), who served under Xiao Cha but had defected to Xiao Yi. When Xiao Cha retreated at night, Lady Gong, unaware of his military failure, mistook him for the enemy; only until the next morning did she realize that it was him and let him in. Subsequently, in order to fend off Xiao Yi's attacks, Xiao Cha became a Western Wei vassal and was created the Prince of Liang.

In 555, after Western Wei forces had defeated and killed Xiao Yi, Western Wei created Xiao Cha the emperor of (Western) Liang (as Emperor Xuan). While Emperor Xuan posthumously honored Xiao Tong as an emperor and Xiao Tong's wife Crown Princess Cai as an empress, he honored his mother as an empress dowager. After he died in 562 and was succeeded by his son Xiao Kui (as Emperor Ming), Emperor Ming honored her as grand empress dowager. She died about three months after her son.