Topham Beauclerk (/boʊˈklɛər/ boh-KLAIR; 22 December 1739 – 11 March 1780) was a celebrated English wit and a friend of Samuel Johnson and Horace Walpole.

[3] In 1744, his father died and the four-year-old Topham, and his widowed mother, Mary Beauclerk, moved to Upper Brook Street in London and lived there until 1753.

[7] Beauclerk entertained Dr Johnson at his home in Old Windsor for a number of weeks.

He appears several times in James Boswell's Life of Samuel Johnson.

The artist Joseph Farington records Horace Walpole as making the following remarks regarding Beauclerk: Lord Orford mentioned many particulars relative to the late Mr. Topham Beauclerc.

This marriage, which gave her two sons, including George St John, 3rd Viscount Bolingbroke, was unhappy and her husband was notoriously unfaithful.

Beauclerk died at his house in Great Russell Street, Bloomsbury on 11 March 1780.

At the time of his death, Beauclerk had amassed a collection of around 30,000 books, although these were kept at his house in Muswell Hill.

From her marriage to Count von Walworth, he was a grandfather to two boys, only one who survived to adulthood, and four girls, the youngest of whom was Countess Emilie (or Amelia) von Walworth, from whom descended the princes of Löwenstein-Wertheim, and through them, other German royalty.