neighbourhood in the London borough of Westminster (Westminster, City of). It lies east of Chelsea, south of Hyde Park, and southwest of the gardens of Buckingham Palace. Part of London's fashionable West End, it has many residential squares featuring large 19th-century houses. Belgravia is part of the Grosvenor Estate, which also includes a large portion of nearby Mayfair. The Grosvenors acquired title to the land in 1677, by way of Sir Thomas Grosvenor's marriage to the child-heiress Mary Davies.

Belgrave Square, the central focus of the neighbourhood, was developed in the 1830s and '40s; it now contains foreign embassies as well as scientific, educational, and commercial institutions. Among Belgravia's main residential squares are Cadogan Place and Eaton Square, which extends along both sides of King's Road. In the southwest corner of Belgravia is the 19th-century Holy Trinity Church. Victoria Station is a short distance to the southeast.