She died in December 1849.

Queen Victoria was very much attached to her gentle, simple-minded, and tender-hearted aunt, and treated her with the utmost consideration and an almost daughterly affection.
[Pageheading: BARONESS LEHZEN] Another person who had a large share in forming the Queen's character was Louise Lehzen, the daughter of a Hanoverian clergyman, who came to England as governess to Princess Feodore of Leiningen, Queen Victoria's half-sister, shortly before the Queen's birth.

In 1824 she became governess to the Princess Victoria.

In 1827 George IV.
conferred upon her the rank of a Hanoverian Baroness.

When the Duchess of Northumberland, in 1830, was appointed the Princess's official governess, she remained as lady in attendance.