Elisabeth Auguste's parents were Joseph Charles of Sulzbach and Elisabeth Auguste of Neuburg, the latter the daughter of Elector Charles III Philip. On 17 January 1742, she married her cousin Charles Theodore of Sulzbach, who became Elector of the Palatinate in 1742 and Elector of Bavaria in 1777. The marriage was arranged to avoid a potential inheritance dispute within the different family branches. While Charles Theodore was described as learned and interested in the enlightenment, Elisabeth Augusta was described as vivacious, pleasure loving, uneducated and shallow. During the first half of their marriage, she is said to have dominated her spouse, and during the Seven Years' War, she exerted influence over the Palatine foreign policy. In 1760, however, it was reported that Charles Theodor was beginning to free himself from her dominance. Elisabeth Auguste bore only one child, a son on 28 June 1762, twenty years after their marriage; but the long-awaited son and heir to the Palatinate died just one day after his birth. The couple thereafter largely lived apart, each one taking lovers of their own. Divorce was never contemplated. Due to her not having a child and unable to have another legitimate child due to the discontinued marital sexual relations, she had no power base at court after she had lost her personal influence over her spouse. In 1764, Charles Theodor had an official mistress, the dancer Françoise Despres-Verneuil, who was succeeded by Josefa Seiffert in 1766, which was a humiliation for Elisabeth Auguste. Elisabeth Auguste moved to her own residence of Schloss von Oggersheim, where she lived permanently with her own court from 1768, only making formal visits to the court of her spouse in winter: after 1781, she discontinued also with these visits. She did not like the Bavarian court, which she regarded to be too spartan for her taste. She was quite popular in the Palatinate, especially since Charles Theodor moved to Bavaria in 1777. At the end of 1793, in the face of advancing French troops, Elisabeth Auguste fled to Weinheim, where she died in 1794. Her husband subsequently married Maria Leopoldine of Austria-Este.
Titles and styles
17 January 1721 - 17 January 1742: Her Serene HighnessCountess Palatine Elisabeth Augusta of Sulzbach
17 January 1742 - 31 December 1742: Her Serene Highness the Electoral Princess of the Palatinate
31 December 1742 - 30 December 1777: Her Serene Highness the Electress Palatine
30 December 1777 - 17 August 1794: Her Serene Highness the Electress of Bavaria
