Coordinates: 51°29′14″N 0°9′19″W / 51.48722°N 0.15528°W
Ranelagh Gardens (/ˈrænɪlə/; alternative spellings include Ranelegh and Ranleigh, the latter reflecting the English pronunciation) were public pleasure gardens located in Chelsea, then just outside London, England in the 18th century.
The Ranelagh Gardens were so called because they occupied the site of Ranelagh House, built in 1688–89 by the Earl of Ranelagh, Treasurer of Chelsea Hospital (1685–1702), immediately adjoining the Hospital; according to Bowack's Antiquities of Middlesex (1705), it was "Designed and built by himself". Its actual builder and owner was one Solomon Rieti, an Italian Jewish immigrant. Rieti's niece, Rebecca Rieti, was the grandmother of Benjamin Disraeli. Ranelagh House was demolished in 1805 (Colvin 1995, p 561).
In 1741, the house and grounds were purchased by a syndicate led by the proprietor of the Theatre Royal, Drury Lane, and Sir Thomas Robinson MP, and the Gardens opened to the public the following year. Ranelegh was considered more fashionable than its older rival Vauxhall Gardens; the entrance charge was two shillings and sixpence, compared to a shilling at Vauxhall. Horace Walpole wrote soon after the gardens opened, "It has totally beat Vauxhall... You can't set your foot without treading on a Prince, or Duke of Cumberland." Ranelagh Gardens introduced the masquerade, formerly a private, aristocratic entertainment, to a wider, middle-class English public, where it was open to commentary by essayists and writers of moral fiction.