Lovisa Sofia "Louise Sophie" von Fersen, née Piper (26 October 1777 – 4 January 1849), was a Swedish countess and courtier.
[1] Louise von Fersen was the daughter of court chamberlain Sten Abraham Piper and Catharina Ehrensvärd, who had been hovfröken (maid of honour) prior to her marriage.
She served as maid of honour to princess Sophia Albertina of Sweden in 1794-97.
She married the courtier count Fabian Reinhold von Fersen in 1797.
Count Hans Gabriel Trolle-Wachtmeister said of her that she "was the most beautiful Juno-like figure you could see [...] undoubtedly the most accomplished woman in high society".