Ranelagh may refer to:

Towns and villages

• Ranelagh, a residential area and urban village on the south side of Dublin, Ireland
• Ranelagh, Buenos Aires, a suburb of Buenos Aires, Argentina
• Ranelagh, Ontario
• Ranelagh, Tasmania

Other places and geographical features

• The Ranelagh Club, a famous polo club formerly located at Barn Elms, South West London
• The Ranelagh River and Ranelagh Sewer, names at various times for parts of the River Westbourne
• Ranelagh Gardens, an 18th-century pleasure garden in Chelsea, London; now part of the grounds of Chelsea Hospital
• Ranelagh Gardens, Liverpool, a similar pleasure garden in Liverpool
• Ranelagh Luas stop, a light rail stopn in Dublin, Ireland
• Ranelagh station (Paris Métro), a station of the Paris Métro on the Rue de Ranelagh, Paris
• Ranelagh School, Bracknell, England

People and titles

• Baron Ranelagh, a title in the Peerage of Ireland
• Earl of Ranelagh, a title in the Peerage of Ireland
• Viscount Ranelagh, a title in the Peerage of Ireland

Schools

• Ranelagh School, a school in Berkshire, England

Other

• Ranelagh Harriers, a road running and cross-country club based in Richmond, London
• HMS Ranelagh (1697), a ship of the British Royal Navy