Marguerite Gardiner, Countess of Blessington (1 September 1789 – 4 June 1849) was an Irish novelist. She was for some years editor of The Book of Beauty and The Keepsake, popular annuals of the day. In 1834 she published her Conversations with Lord Byron. Her Idler in Italy (1839–1840), and Idler in France(1841) were popular for their personal gossip and anecdotes, descriptions of nature and sentiment.
A bush course on which a mostly two day event was held, located on Crown land between Blessington Street and the Point Ormond, once a year.