Countess Christina Augusta Löwenhielm (née von Fersen; 10 March 1754 – 8 April 1846), was a Swedish noblewoman and courtier.

Both her parents spent their life in service at the royal Swedish court, and Augusta von Fersen, as well as her sisters, served as hovfröken (maid of honour) prior to her marriage.

During the 1771 winter social season in Stockholm, Augusta Löwenhielm was courted by prince Charles, who had recently returned to Sweden after having been sent abroad to separate him from Brita Horn.

In 1774, king Gustav III convinced his brother duke Charles to agree to a dynastic marriage with Hedvig Elisabeth Charlotte of Holstein-Gottorp.

Augusta Löwenhielm remained in Sweden until she was explicitly ordered by the monarch to join her spouse in Dresden prior to the wedding of Charles.

The condition in question separated the prince from her, accustomed him to others, a habit he has since then never abandoned, and the purpose being achieved the monarch saw that the ridicule would affect no one but the spouses.

The spouse of Charles, Duchess Charlotte, describes the incident in her famous journal: "She is with no doubt delightful, her facial features are pleasant, her appearance appealing, and dressed for ball, she is quite magnificent, thought perhaps somewhat stout.

Instead, she had a brief affair with baron Carl Adam Wachtmeister and with the Russian Prince Alexander Kurakin, who had been sent to Sweden by Catherine the Great to officially bring the news of the marriage of the Grand Duke.

Duchess Charlotte, the wife of Duke Charles, noted in her famous journal that Augusta did not have a bad effect on Charles, and that she was a kind person who, due to her tolerant attitude toward others, was also treated tolerantly herself: "As it happened the other day, Countess Löwenhielm was late at dinner and arrived a quarter of an hour after it had started, and unfortunately, Baron von Essen arrived at the same time.

Charlotte then replied: "She may not be more careful than others, but of a kind and goodhearted nature, she is friendly toward all and does not interfere in other people's business, which makes her less exposed to slander than most".

His proposal was met with great dislike within the royal court because of sympathy with the popular Augusta von Fersen, and he was challenged to a duel by his rival count Adolph Ribbing.

The duel took place in the royal riding house in the presence of several officers and led to the defeat of von Essen, who was slightly injured.

After the Riksdag of the Estates of 1789, when Gustav III came in conflict with the nobility, he arrested her uncle Axel von Fersen the Elder as a leader of the aristocratic opposition to the Union and Security Act and the Russo-Swedish War (1788–90), but unlike many other female members of the nobility, she never joined the demonstration of Jeanna von Lantingshausen.