Lady Charlotte Susan Maria Bury (née Campbell; 28 January 1775 – 1 April 1861) was an English novelist, who is chiefly remembered in connection with a Diary illustrative of the Times of George IV (1838).

Lady Charlotte Susan Maria Campbell was the daughter and the youngest child of Field Marshal John Campbell, 5th Duke of Argyll, and his wife the former Elizabeth Gunning; Elizabeth was the second daughter of John Gunning, of Castle Coote, County Roscommon, and the widow of James Hamilton, 6th Duke of Hamilton.

After Lady Charlotte had been widowed in 1809, she was appointed a Lady-in-Waiting in the household of Caroline of Brunswick, Princess of Wales.

The charge of the authorship was not denied, and no one else has claimed to have written the diary, which public libraries began to catalogue under Lady Charlotte's name.

[3] There are many instances in the diary that call into question the identification of Campbell as the author, chiefly on page 339 of volume one where the diarist writes the paragraph quoted below.

Lady Charlotte Campbell told me, she regrets not seeing all these curious personages ; but, she said, the more the Princess is forsaken, the more happy she is at having offered to attend her at this time.

In a paragraph on Page 133 of volume 3 the diarist writes, "Lady C. hints that Mr. Brougham intends to restrict the Princess of Wales to thirty thousand pounds, and to employ the remainder in paying the debts ; and that the salaries of all her attendants must be diminished.