Augusta Hall, Baroness Llanover (21 March 1802 – 17 January 1896), born Augusta Waddington, was a Welsh heiress, best known as a patron of the Welsh arts.
She was born near Abergavenny, the youngest daughter of Benjamin Waddington of Ty Uchaf, Llanover and his wife, Georgina Port. She was the heiress to the Llanover estate in Monmouthshire.
In 1823, Augusta became the wife of Benjamin Hall. Their marriage joined the large South Wales estates of Llanover and Abercarn.
Hall (1802–1867, after whom "Big Ben" is said to have been named, as he was Commissioner of Works in 1855 when it was built), was for some years Member of Parliament for Monmouth, but transferred to a London seat just prior to the Newport Rising which brought with it a turbulent time in Monmouthshire. He was created a baronet in 1838, and entered the House of Lords in 1859 under Prime Minister Palmerston as Baron Llanover. However, his wife overshadowed him in life and subsequent reputation.
In 1828, the couple commissioned Thomas Hopper to build Llanover Hall for them. It was designed as a kind of arts centre as well as a family home.
Lady Llanover had always been interested in Celtic Studies. Her sister, Frances, had previously married a German ambassador to Great Britain, Baron Bunsen, whose social circle was also interested in Celtic subjects and culture.